Computer + Video Games - Retro CDN

JUNE 1982 75p

VIC: The VCR-20 is an ultra low power (CMOS) 20K RAM plug-in cartridge, retailed at £64.00 ready built and tested. We can also supply wi th only 4K of RAM, ready-built at £24.00 and as many extra 2K RAM chips (HM6116) as you require at £5.00 each. No PSU required, black^beige cover. The VCS is a cartridge simulator and combines the advantage of the motherboard wi th two slots and the 8K battery back-up CMOS RAM. This emulates car-tridges and adds 8K to RAM. Available in ready-built form £44.00.

ATOM: The DUO-1 is the latest 64K memory add-on designed for the Atom, combining very low power consumption (200mA at +5V) and RAM power. This runs, loads and saves 64K basic programs. Ready-built and tested £70.00. No PSU required.

ZX81: The SPECIAL RAMPACK is the nicest around, only 3in x 4in cased in a black t r im matching case, offers 56K of RAM to make together wi th the 8K Sinclair ROM the most powerful system in that size. No PSU required. Ready-built £60.00.

32K RAM CARD: 48340 bytes free . . . for TRS 80 and Video Genie. No PSU required. Ready-built £46.00.

64K DRC MODULE FOR PET 8i UK101: Ready built £80.00.

ALL ORDERS GENERALLY EX-STOCK PLEASE CONTACT OUR SALES OFFICE FOR FURTHER INFORMATION

All prices are correct at t ime of going to press — Prices include VAT at 15% and p&p for the UK — Quantity discount available for export and dealers — Order by phone: ZX81, TRS-80, Video Genie andZ80 based: Southend (0702) 613081 — Vic, Atom, Pet, UK 101 and 6502 based: Southend (0702) 618144. Telex: 995337 G AUDCOM. Access and Barclaycard. All mail to: Audio Computers, 87 Bournemouth Park Road, Southend-on-Sea SS5 2JJ.

JUNE 1982 No 8

News & Reviews GAMES NEWS 18 Fight the nightmarish Jelly Mons-ters. search lor the sword of peace and hold on to your clothes on a trip into the sleazy side of life,

VIDEO SCREENS 22 Take to the ice with the tough hoc-key teamsters and find out about a brand new Home Arcade centre and its batch of games.

ARCADE ACTION 30 Monkey around with King Kong and watch out for strange things at the bottom of the garden, plus our regu-lar pwball column.

REVIEWS 70 Take a ride on the Microtrain and why not take a Rubik's Cube on the journey?

Listings WORLD CUP MANAGER 32 Are you the football brain which could take Honduras to the World Cup Championships? Or will the Sharp's soccer style prove too good? Recommended to football lovers everywhere,

TROLLS GOLD 42 Can you beat the Apple Troll and steal his golden treasure?

SPEEDBOAT Brave a log-filled torrent in your floating VIC-20. A well-thought-out game set on a river journey for those of you with nimble fingers and a quick brain.

46

SAVE THE PRINCESS 50 In days of old when knights were bold . . . can you rescue the Acorn Atom maiden in distress and keep her from the clutches of Bad Baron Megabyte? Brave Knights only need apply.

SINCLAIR SELECTION 54 Two ZX81 games — one in IK and another for all you 16K owners.

HELICOPTER LANDER 57 Your job is to land a Pet helicopter on an oil rig in a choppy North Sea. A new twist to the popular "landing" series of games.

DOG STAR ADVENTURE 58 Strike back at the Empire in a Star Wars style adven-ture for Tandy owners. Your task is to roam the space-ship of General Doom and rescue Princess Leya, leader of the Forces of Freedom.

BOING 65 Bounce around with Barney — and help save his life on the Atari.

World Cup Halftime in the World Cup semifinals and you're 2-0 down to Czechoslo-vakia . . .

If you thought that was the kind of pressure which could only be put on Ron Greenwood this summer, you hadn't reckoned with our World Cup Manager game. It runs on the Sharp MZ-80K but without a PEEK or a POKE so anyone with enough memory should be able to convert it.

Your task is to try and win the World Cup, with Brazil it's hard. With El Salvador, it's heartbreaking — but just about possible.

This is your chance to get Over the Moon or Sick as a Parrot even before the World Cup proper kicks off. 2.

Features MAILBAG 5 More of your views on view,

COMPETITION 9 Win a BBC microcomputer by solv-ing our Beat the Bug covet puzzle on a computer. And an Atari T.V. games centre is up tor grabs.

BUGS 13 The Bugs hit the World Cup trail.

BRAINWARE 17 Teasers to test your brain power.

CHESS 25 More mind boggling problems from the board of Max Btamer.

GO 27 Program your ZX8I to play the ancient strategy game.

ADVENTURE 29 Castaway on the Savage Island with Keith Campbell.

PRACTICAL PROGRAM-MING 66 Top-down structuring with Ted Ball.

GRAPHICS 69 The importance of curves discussed by Gary Marshall.

KIT KORNER 73 All about the kit built Acorn Atom.

DOWN TO BASIC 76 Moira Nome tells you how to store data.

HARDCORE 80 Our games-oriented review of the Commodore Vic-20.

SOFTWARE GLOSSARY .83

Editor Tarry Piatt Assistant editor EUpelh Joiner, Edi tor ia l assistant Susan Cameron Design Linda Fteeman. Production editor T im Metcalfe. Advert isement manager Rita Lewi* . Adver t is ing execut ive Nei l Wood. Advert isement assistant Louise Flockhart. Publisher Tom Moloney

Editor ia l and advert isement olticea; Durran i House. 8 Herbal Hi l l . London EC1R i l B Telephone Edi tor ia l 01-278 6446. Adver t is ing 01-278 6SS2

COMPUTES AND VIDEO CAMES POSTAL SUBSCRIPTION SERVICE. By using the special Postal Subecripl ion Service, copies of COMPUTER AND VIDEO GAMES can be mai led direct (torn our ofi ices each month to any address throughout the wor ld. A l l subscr ipt ion app l ica t ions should be sent for processing to COMPUTER AND VIDEO GAMES Subscription Department). Compet i t ion House, Farmdon Road, Market Harbotoj igh. Leicestershire. A l l orders should Include the appropr ia te remit tance made payable to

COMPUTER AND VIDEO GAMES Annua l subscript k m rates '12 issues): UK and Eire £10.00 Overseas surface m a i l £12.00 A i rma i l Europe £20.00 Add i t i ona l service in tormat ion including ind iv idual overseas a i rma i l ra les ava i l ab le upon request Publ ished and d is t r ibuted by EMAP Nat iona l Publ icat ions Ltd. Printed by Eden Fisher (Southend) Limited.

© Computer tr Video Gaines Limi ted ISSN 0261 3697.

Cover: Model Dorian Cioes Photograph — Geoff Howes

3 COMPUTER 8t VIDEO GAMES

THE WEST END A V A PERSONAL COMPUTER

ATARI CENTRE jmiminiMmtiiuumm

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; v m s m i1 ATARI 400A COMPUTER 16K RAM. full features at en economic price.

ATARI 8 0 0 COMPUTER _ _ 16K to48K RAM. superb construction

. U U modular design, full stroke keyboard. b 3 9 9 . U U

ATARI 810 DISC DRIVE

8BK data storage on a 5'/. inch floppy cisk

ATARI 739 80 COLUMN PRINTER

ATARI 410 CASSETTE DECK

£365.00

We stock full n 16K RAM Ex|

Dot matrix pmter with 6 typefaces plus graphics capacity

£550.00

Digtaf track plus audio track for simultaneous commentary on some programmes

£55.00 of accessories inc:- RS232 Interface Module. Modules. Joysticks, Paddles, Cables etc. All prices include VAT

LONDON'S LARGEST STOCKS OF ATARI SOFTWARE We carry vast stocks of a» aveiabte software suitable for the ATARI Personal Computers

Our staff wit be pleased to assist you in selecting the computer programmes for yew macfwia Educational Plot Invite to program 1 Invite to program 2 Invite to program 3 Conversation French Conversation German Conversation Spansh Conversation Iteken Muse Composer Touch typing Calculator Graph it Statistics 1 States and Capitate Capitals of Europe Assembler/Editor Microsoft Basic Video easel Game* Energy Czar Hangman Kngoom Scram Asteroids

ROM CC cc CC CC cc CC CC ROM CC OCSK CC CC CC CC ROM DISK ROM

£54.00 £18.93 £22.95 £28.95 £39.95 £39.95 £39.95 £39.95 £35.95 £15.95 £24.50 £13.95 £13.95

£9.95 £9.95

£39.95 £59.95 £24.50

Basketball Blackjack Computer Chess Mwsrte Command Space Invaders Star Raiders Super Breakout Humjyty Dumpty & Jack

Hickory Dckory Dock & Bae. Baa Black Sheep British Heritage Jigsaw Puzzles

i Scene Jigsaw

ROM CC ROM ROM ROM ROM ROM

CC

CC

CC

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£29.95 £29.95 £29.95 £29.95 £29.95

£19.95

£19.95

£19.95

Tetefcnk 1 Mortgage & Loan Visicalc Home Financial Management Manuals DOSS Manual Technical notes Operating system listing DOS1 Usti

ROM £19.95 CC £13.95 DISK £119.95 CC p.o.a.

Listing CC - Compact Cassette ROM - PViQ-n ROM cartridge DISK - Floppy Diskette

CC CC CC CC

£9.95 £17.95 £11.95

£3.95

CC CC CC CC

£19.95 £19.95 £14.95 £19.95

CC CC CC CC ROM

£9.50 £9.95 £9.95

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£19.95 £29.95 £24.50 £14.95

Cavemeof Mars Eastern Front 1941 Ghost Huiter Galactic Chase Crypts of Terror K-razy Shootout

Darts Cnb6age & Dorrwnoes Snooker & Billiards Tournament Pool & 8 Bal Pool Jumbo Jet Pilot Submarine Commander Super-cubes & Tilt Commercial Word Processor

The West End Atari Centre. REW Video Products Ltd., 114-116 Charing Cross Rd.(

London WC2. Tel: 01-240 3386. Access. Barclaycard. Amex. Diners plus Instant Credit Terms

DISK £95.95

9T0P PRESS: MANY MOPE PROGRAMMES NOW AVAILABLE INCLUDING:

Rings of the Empre Forest Fire Intruder Alert Scott Adams Adventures 1-12 Packman

Please drop us a line at: Computer and Video Games, EMAP, Ourrant House. 8 Herbal Hill, London EC1R 5JB

SINCLAIR'S NEW BABY Dear Sir, I have heard a good deal about the coming of a Sinclair ZX82 microcomputer. Is it going to be out this year and if so will it be compatible with the ZX81. If we ZX81 users can't upgrade our machines into ZX82s, then how much will this new one cost. Please can you help as I have read so many confusing reports about this machine. T. Robinson, Saffron Walden, Essex.

Editor's reply: The ZX Spectrum has already gone into production at the rate of 20.000 units a month. Clive Sinclair said it would be available to the public within a fortnight of ordering the machine.

It is on sale in two versions. The 16K memory computer sells at £125, while the 48K machine costs £175 inclusive of VAT. II you want to upgrade the 16K version you can do so by buying an internal expansion board which will cost about £60.

The ZX Spectrum isn't compatible with the ZX81 at present, but all the 81 software will run on the new computer with minor variations. It is only slightly larger than the ZX81 with a calculator type keyboard instead of the sensory keyB featured on the ZX81.

The ZX Spectrum incorporates high resolution colour graphics, more memory capacity, a sound generator, a 40 key ASCII keyboard and upper and lower case.

Not only is it compatible with ZX81 software it also has a special port for linking up the Sinclair

The Sinclair Spectrum

printer, and can be plugged directly into an ordinary PAL television set.

Clive Sinclair claims the Spectrum is more powerful than most of the microcomputers now on the market — including the B.B.C. models A and B.

The most interesting part of the new computer is the disc drive called the ZX Microdrive, which will be available lor the machine in a few months time. Measuring about 4 x 4 it will provide data storage on floppy discs, and the units can be stacked onto each other giving extra capacity.

Altough there is no software specially for the Spectrum at present Sinclair plans to introduce some later.

SELLING SOFTWARE Dear Sir, I am writing to enquire whether or not there is any law preventing the sale of software from a private residence. I have written several enjoyable 16K ZX&l games — including a graphics-adventure — a home management program and a wages calculation program, which I am considering selling on

tape, from home, or if some law prevents this, to a software purchasing company, the quality hopefully being high enough for them.

Please could you tell me how much, on average, these companies pay, and if there is any law concerning the first part of my letter? Gary Coxon, Cavetswall. Staffordshire. Editor's reply: The only thing that could affect your private sales is the mortgage or rental agreement covering the residence. It might be wise to check this. At the same time you could find problems with the local rating authority if they consider that the volume of business has changed the basic use from residential to business.

However. I doubt if you'll do enough business to worry them, or the VAT man either. You could find problems though If the volume of trade caught the eye of the -tax man.

DEALER'S DILEMMA Dear Sir,

In recent months, we have advertised our Byg Byte 16K Ram Pack in your

magazine and in this advertisement we stated that delivery could be expected within 28 days.

However, during the past six weeks, many people who have ordered these Ram Packs have had to wait longer than the stated 28 days due to circumstances beyond our control. Over 25 per cent of the initial batch which we despatched were damaged beyond repair by the Post Office and this has necessitated our having the packaging redesigned which caused the delay, /. G. Lane. Computer Aided Printing Services, Petersfield, Hampshire.

AUNTIES MICRO Dear Sir, I have received your magazine since the first issue, and have noted that there have been no programs dedicated to the B.B.C. micro.

At the moment I am awaiting delivery of my model B, and feel that it is a great pity that this micro seems to have been overlooked within your pages. K. Stephenson. Cockermouth, Cumbria. Editor's reply: After a slow start, there are now enough B.B.C. Microcomputers finding their way out to the public to justify publishing listings for this machine. Far from "overlooking" the machine we have been very conscious of the need to cover it but felt we had to wait until sufficient machines were available. Turn to the centre ol this magazine Mr Stephenson for our first look at what is going to be a very popular microcomputer.


The best enhancement yet

for the ZX enthusiast - for just £9!

you make the right choice. There will be exclusive pre

release snippets on products which are about to hit the

market. Our aim is to make Sinclair User invaluable and

we will chronicle applications which are of special interest

For example, in the first issue we will look at

business applications and we visit a school where the

pupils are having the time of their lives using their

Sinclairs. Each month we will carry eight pages of

programs. Another must for every user is our first rate

helpline service. And we intend to carry as much

information as possible about clubs.

Last but not least let us say that the best way you can

guarantee you like the magazine is by participating

yourself. Don't forget to ask us your queries; send in

your programs for which we will pay £10 if we publish

and be sure to tell us if you are using your ZX 81 in a

special way. Send in your club news and tell us of any

interesting people out there in userland. And just in case

you need further convincing, look at the editorial plans

for the first six issues.

Can you continue to get the most out of your ZX

without reading the Sinclair User? So why not fill in the

subscription order form today?

What is the best way to guarantee that you never become bored with your Sinclair computer?

The answer is to subscribe to Sinclair User ... wntten

specifically for owners of ZX 80's and ZX 81s. Sinclair

User is the latest monthly from ECC Publications •

pioneers of Practical Computing, WHICH COMPUTER?,

and Computer & Video Games. Whether you bought

your system yesterday or are an old hand, you are

probably an enthusiast for your machine. And your

biggest problem is likely to be obtaining all the

information to satisfy your interest. We promise that

Sinclair User will be devoted enlirely to quenching your

thirst for information.

Issue one is Published on 1 April and is an absolute must

for Sinclair devotees. So make sure you guarantee that

you get your copy by taking out a subscription now.

As the name suggests, the content will be geared

specifically to helping the user. There will be pages of

information on available hardware and software. Our

expert writers will analyse established products to help

Editorial Plans Apri l Hardware overview Software overview

May Tlie Sinclair 16K RAM dissected Adventure ^m*-4. program* June Disks, o look mto the future Graphics software

July The ZX81 memory map .uulysed Defxjyginy programs

August The Sinclair printer and its .iltermtives Chess pmgrams

September f Enhancements (or the enthuuast ^

f

Business software lor the ZX8t

iT

> & O c * V


CRASHING PROGRAMS Dear Sir, I happen to be one of the many people who received a ZX81 for Christmas. When I key-in one of the games for the ZX81 and start playing, the system quite often crashes, why? If it is because it needs a larger heatsink then tell me what a heatsink is and where to get one.

When trying to program a Breakout game, I managed to get a ball bouncing around the place and get a bat at the bottom but then I ran out of memory. Could you please put in your magazine an article on saving space specially for the IK ZX81?

Also on the side of the ZX81 there are some holes for plugs, two of them are for recording but the cassette recorders I have access to have a five-pin socket. Could 1 take the ZX81 apart and fit a new five-pin socket? 1 already have a line. /. Sabane, Waimer, Kent. Editor's reply: You don't say whether you are using a RAM pack. If not, then there is something wrong with the system and it should be exchanged. If yes. then make sure that it is well supported and does not get moved whilst in use. A momentary disconnection at the rear will lose all data.

The ZX81 needs a fairly high inputoutput voltage for record-load. A five-pin DIN socket, as you describe, would probably not give an adequate signal. You must use a tape recorder with phono sockets — just like the ones on the computer.

GETTING IT TAPED Dear Sir, I am the satisfied owner of a ZX81, finding it more than ample for a home computer. I now wish to purchase a tape recorder solely for use with the ZX81 and wonder if you

could advise me on the best machine to buy.

I would be interested to know if the Vic cassette unit would be compatible with the ZX81 and if I could expect better reliability than with ordinary tape machines. P. Mooney, Orpington, Kent. Editor's reply: There are several cassettes on the market, but if you want to be sure about compatibility it is best to get one which was built for use with the ZX 81. The ECR81 Enhanced Certified Recorder is available from Monolith Electronics at 57 Church Street. Crewkerne, Somerset.

I know better than to say that it is impossible to interface the Commodore cassette unit onto the ZX81 but it would be difficult in the extreme. The unit was built especially for Commodore products. It is best, and more reliable, to use the recorders recommended by Sinclair. If you want a list of these you should get in touch with Sinclair Research.

OF REMS AND ROMS ... Dear Sir, I am only 13 years old and I took up computing when I first saw your excellent magazine in my newsagents.

I have a few questions to ask. In programs containing machine-code I have seen the particular machine-code routine stored in REM statements but I thought that REM statements were ignored by the computer, so how is the machine-code carried out?

I am thinking of purchasing a new 4K graphic ROM module from DK'Tronics. I have heard that it contains a full set of Space Invaders graphics characters, and 1 am wondering if you could print an Invaders' program for people with this ROM?

Would it be possibe to adapt my ZX81 to colour? If not I would like you to congratulate the artist who

drew the picture in the Sinclair advertisements, because it is extremely realistic!

Would you please tell me which is better, the Sinclair ZX81 or the Acorn Atom, This is a source of excessive arguments between myself and my friends. I don't care what answer you give but please give one!

I think the ZX81 is extremely good value for money because you can buy a ZX81 complete with 16K-byte RAM pack and printer for approximately £170.00 and this is just over the price of a ready assembled 2K Acorn Atom.

Also, although the Sinclair manual is very comprehensive, is there any book I could get which goes into everything?

One last question. Is it possible to get a keyboard for the ZX81 with a case that it can fit inside. I like this idea because I think it will look better and improve your programming speed. M. Sacaloft, Bury. Lancashire.

Editor's reply: The ZX81 has an interesting way of using REM statements when in line 1 of a program. Any data after the REM are put into a special buffer in the memory.

No doubt when a number of people have purchased the DK'Tronics ROM sufficient programs will become available.

The extra cost involved in adapting your machine to colour would probably not justify the adaption. If Sinclair bring out a colour machine later this year it will probably use ZX BASIC — so upgrading to that would be a better bet.

There are so many books on the ZX81, and most of them leave much to be desired. You will probably have to buy three, or four, to cover most of the possibilities available.

If you look through this, and other magazines, you will see at least six manufacturers of keyboards. Most supply cases to take the ZX81 boards, and at around £30.

PROGRAMS ON SCREEN Dear Sir, The Games News, Arcade Action, Video Screens and Software Reviews of your magazine are really good and so are the drawings but couldn't we have some photographs of the actual program while it is running? This could also help would-be buyers on which hardware to buy.

Finally, who is the little man holding the book on your January issue with the big snout? Mr D. Sinden, Stroud, Kent.

Editor's reply: Game graphics have not always been as exciting and colourful as we might wish. And our early decision to use illustrations instead of screen photographs was based on a belief that through drawings we could capture more of the theme a programmer originally hoped to portray before he was forced to compromise because of limited graphics facilities.

Screen graphics are now reaching new standards and in the future we will not be sticking so rigidly to the illustrations-only policy.

The characters featured on our covers are entirely fictional and any resemblance between the little man with the big snout and persons, living or dead, is entirely coincidental.


TECHNOMATIC LTD Dept C&VG. 17 Burnley Road, London NW10 1 ED Tel: 01-452 1500 450 6597

Please add 40p P&P f 15% VAT BARCLAYCARD & ACCESS CARDS ACCEPTED. MINIMUM TELEPHONE ORDER £5.

Retail Shops: 15 Burnley Road. London NW10. 305 Edgware Hoad, London W2

YOUR ONE STOP SHOP FOR PERSONAL COMPUTERS, ACCESSORIES, SOFTWARE & COMPONENT REQUIREMENTS

ATOM Basic built £140, Expanded 12K + 12K £180 (C3 p&puni t ) 1 8A 8V ATOM PSU C7 3A 5V regulated PSU £22 (£1.50 p&p).

HARDWARE IK Ram (2 x 2114 low power) £2 P.P. ROM £20. Buffers: 74LS244 £0.70. DP8304 £4.50, 8ILS95 £0.90, Via 6522 £5.00.

CONNECTORS BUS: Plug £3.50, skt £3.50, PRINTER: Plug £2, skt £2, VDU: Plug £0.90, skt £0.90, Centronix Type 36 way connector £6.50

MEMORY EXPANSION 8K SRAM f up to 16K eprom or 16K SRAM can be populated as you progress. PCB: £11.50 (incl. interfacing data). 64K Dynamic RAM card (expandable to 128K). Fits inside the case. Std 1.8A PSU adequate. Built £95.00 p&p 75p. ATOM colour encoder card £39.00.

SOFTWARE FIRMWARE Toolbox-ROM. Many new exciting commands ind. uprating cassette read write level to 1200 baud and visual indication whilst loading. Price incl. instruction manual £25.00

ATOMSOFT Games Pack 1-10, Maths Pack 1-2, Soft VDU, Chess. Desk Diary, Fourth, Data Base etc. £10.00 each. Word Processor ROM and manual £26.00 Fruit Machine, Break Out, Disassembler UFO Bomber. Pinball £3.50 each. 747 Fit Simulator, Invaders, Galaxian, Chess £7.00 each. BOOKS (no VAT): "Getting Acquainted with your A tom" £7.95. "A tom Magic" £5.95. "A tom Business" £6.95. P&p book 70p.

ATOM DISK PACK: « 4 0 Track s.s. 51"disc drive card with 4K DOS ROM • Complete wi th connector and cable

SEIKOSHA GP100A PRINTER • Full graphics capability • AM modes can be mixed • 116

110" wide paper • S e l f test ASCII Char • O o u b l e width char, printing £199 + £8 carr.

EPSON MX 80 F/T • 80 CPS Bidirectional Travel • High Res Graphics Condensed, emphasized, enlarged char. F/T 1 £350 F/T £360 £8 carr. (F/T 2 has been recommended for BBC Micro) 12" BMC Monitor Green Screen £140 +£6 carr 14" Colour Monitor Chassis mounted £165 + £6 carr 14"Colour Monitor in A1 cabinet £190 +£6 carr.

psu to run both the disc pack and a fully expanded ATOM • Disc controller • Full operating instructions & manual £299 + £6 carr.

ATOM SOUND BOARD Board plugs into ATOM bus. Programmable sound generator allows full audio frequency output, plus two parallel and one serial ports. On board ROM with demo program. Can be connected directly to hi-fi system. Complete kit £35.00 t- £1 p&p

ATOM VISION Ultrasonic transducer driven by a stepper motor under soft-ware control. Many exciting applications including robotic vision, computer tracking, measurements etc. See April PE for detailed information. Complete kit £46 00 + £1 p&p.

Z X 8 1

SEND FOR OUR DETAILED ATOM LEAFLET

UPGRADE YOUR ZX81 WITH A PROFESSIONAL KEYBOARD One piece 47 key full travel keyboard module fully built wi th flexible connectors ready to plug intoZX81. No soldering or desoldering necessary £33 + £1 p&p. An attractive anodised custom made case to house our keyboard and the ZX81 pcb£13 00 - £1 p&p. Your ZX81 could look like

EXPANSION ACCESSORIES: MOTHERBOARD: This board provides the most economical and reliable way of fitt ing two add-on boards plus the RAM PACK On board voltage regulator drives all external boards and overcomes the overheating problems £10.50. Female to female connector £5.50 (to connect ZX to motherboard). Female to male £5.50 (to allow remote positioning of RAM pack and other add-ons). 3K STATIC RAM BOARD for ZX8Q«1 £16.00. 16K RAM PACK £26. HIGH RES GRAPHICS BOARD (256 x 192 Pixels) 6K RAM on board. Resident software in ROM provides extremely fast hi-res facilities which include MIXED TEXT and GRAPHICS. Screen can be copied to printer £75 + £1.50 p&p. ZX SOFTWARE DEFENDERS. ASTEROIDS, £5.50 each. INVADERSPLANETOIDS, NIGHTMARE MUSIC, DRAGON MAZELIFE £6,05 each. CONSTELLATION £7.00, DICTATOR £7.80, STAR TREK, BUMPER 7 £4.30 each and more WIDE RANGE OFZX BOOKS IN STOCK. SEND FOR OUR DETAILED PRICE LIST.

ADD 40p P&P + 15% VAT on alt orders


Can you Beat The Bug on our

give-away front cover puzzle and

win a BBC Microcomputer?

A much-sought-af ter BBC

micro will be despatched to the

winner of our Beat-the Bug com-

petition.

The puzzle can be done with-

out a computer. Just punch out

the small tokens on the bottom of

the card and place them on the

puzzle as indicated. Then the

task is to move the da ta from

computer Z into computer A and

replace it with the da ta from

computer A.

But there is a Bug floating

about to make things awkward .

The rules of the puzzle are:

• Move two pieces of da ta first,

then move the Bug.

• From here data and Bug are

moved alternately.

• Data can only move towards

its destination.

• Only one piece can occupy a

location at any time.

• The Bug can move in either

direction.

• Moves are a long the l ines to

neighbouring locations.

It may look deceptively easy

but it does take some careful

thinking to work out the answer.

More importantly it should take

a good deal of careful thought

before attempting a program to

solve it. It is more difficult than

the four octagons puzzle we set

you with in our first issue. The

response to that first puzzle took

us by surprise — we weren't

expecting 800+ solutions — but

this t ime we think we're ready

for you.

We are working out a reason-

able time to solve the puzzle so

please write on your program

how long it takes to come up

with the answers.

The objectives are first: to pro-

duce the best program to solve

the puzzle; to find out how many

solutions there are; to find out

how many distinctly different

solutions there are (discounting

reflections and rotations) and

what the shortest solution is.

Finally to discover if it is poss-

ible to get the Bug to end up in

the middle or not.

The program will be judged on

the following criteria: Does it run

correctly (bug free)? Does it f ind

the solutions? How fast does it

find a solution? Does it f ind al l

solutions and how quickly? Con-

cise programming. Good use of

memory space . I m a g i n a t i v e

algori thms. Is it self contained?

Presentation.

Write the program on any sort

of computer, or just in p la in

Basic and send it as a listing or a

cassette to us before June 16. We

wil l include a way of solving the

puzzle next issue — just to prove

that it is possible.

Send it in to Computer & Video

Games . Durrant House. 8, Her-

bal Hill , London EC1R 5JB. The

judges* decision is f inal and no

correspondence can be entered

into.

Make sure you include a name

and address and the t ime the

program takes to find one solu-

tion. Also be sure to let us know

what mach ine it runs on.

The 15 places in our special free Star-web game were very swiftly fi l led after the May issue found its way into the newsagents.

Our 15 computer moderated game sters are: David Johnson of Stoke, Paul Kershaw of Littleborough, Steven Draper of Sudbrooke. Marcus Rowland of West-bourne Park, Paul Hardy of St Annes, Anthony Shepherd of Barnsley. Keven Stubbs of Stockport, D.P.Goodman of Stevenage, Jenny Parsons of Stirling-shire, I.C.Spicer of West Norwood. Richard Moore of Wolverhampton, Stephen Loughran of London NW6, Mark Woolrich of Wheatley. Angie Bradley of Birmingham and Bernard Andrews of Manchester.

For the many people who entered but were not lucky, we are looking into the possibilities of running a much larger computer moderated game in Ihe Autumn.

P a c m a n g a v e

arcade managers

plenty of food for

t h o u g h t . I n

America it was

the f irst v i d eo

g a m e which proved attractive to

women and brought a family

touch to the video industry.

In such a male-oriented world

as the video industry we won-

dered if British arcade owners

wil l follow the American busi-

ness th inking which has since

s p a w n e d Ms P a c m a n ! Are

women worth exploit ing? We

find out in July.

Imhotep the pyramid bui lder is

our featured g ame next issue.

Upon the desert of the east, the

first pyramid was raised and the

strain on the entire country was

great indeed, can you gu ide your

workforce of 1000s to success in

the desert?

Cas ino Royale, Solitaire and

Missile C o m m a n d a lso feature —

as our games listings.

The Prestel page features a

long look at the recent competi-

tion to produce a Sinclair down-

loader. Find out about Telesoft-

ware — it could change the face

of personal comput ing.

The Spectrum will a lways be

the Sinclair '82 to owners of that

company's earlier models. It's

potential is obvious but is it

going to take over from the ZX81

and , if so, how quickly? Our July

issue wil l include a 16 page sup-

plement for Sinclair owners.

From those who still haven't

exhausted the possibil it ies of

their ZX80, to those who have a

yearning for a Spectrum. Some-

thing for every Sinclair user and

everyone who has been keeping

more than one eye on this

innovat ive company.

Keep an eye out for our July

issue at the newsagent or order

your copy now.

I would like to lalu- out ;tn annua) jwtwcrijition-1 j lend)***ache jw/PO. ft>« £1">.<£J»Over**w.H)fur I twelve tasues. Com|>utrr& VktwiGHme*, Bivtim; 1 Court, Bret I on, iMerbontunh PE4*I>Z

I Name

ArMfY**

M

I

C o m p u t e r Thnindga/lnp thrtt riwiKj-s i iwiifKiU-rs fiwi

P R O G R A M S B Y P O S T F R O M

a t a r i p r o c r a m s 4 1 C A S II

* Compare our prices * Compare our range

All prices include VAT. P&PFREE £«stem front 1941 Ca verns of Mars C ^ c t i c chase £ ^ y u s h 0 0 ' o u » Wiost hunter

Sfiar" Missile Command Asteroids Super Breakout Pilot Microsoft Basic Assembler/Editor ^ J j ^ ^ o r d Processor

CAS CAS

16k 16k

CAS 16k ROM 16k CAS J6k CAS 16k ROM 16k ROM 16k ROM 16k ROM 16k ROM 16k DISK 32k ROM 16k DISK 48k CAS 24k CAS 16k CAS 16k CAS 16k CAS 16k CAS 32k DISK 40k CAS 16k CAS 24k

16k 24k 8k

CAS CAS CAS

CAS CAS CAS CAS CAS

424.95

£28.95 £15.50 £28.95 £19.50 £28.95 £27.95 £27.95 £27.95 £27.95 £49.95 £55.95 £36.95 £91.95 £15.50 £15.50 £15.50 £11.99 £11.99 £15.95 £31.95 £15.95 £13.95 £13.95 £13.95 £10.99

1 M I aircrafl On Release your bomb* and or to destroy the enemiee gun positions CT.M

• VIC acts si the board and vndge in a two player strategy a line Flank your opponent* pioce* and tee then your colour Excellent gam* of •

i piece* and tee the m convert to > of strategy end skill VIC acts a«

your opponent 8k expansion required t l t . H

24k 8k

16k 16k 24k

CAS DISK DISK CAS CAS CAS CAS CAS CAS CAS

16k 40k 40k 32k 24k 16k 16k 16k 24k 40k

CAS CAS CAS CAS

40k 32k 16k 16k

forest fire ~ K»9»of the Empire Intruder alert Mountain shoot Sunday golf

trek 3.3 Waterloo Airstnke Outlaw/Howitzer Avalanche 747 U n d m g E m u l a t o r

A&r12byScott

AnOfle Worms Lunar lander Movjng maze Alpha Fighter Madera. Awesome World Warlll Beneath the Pyramids

Jw Bomber NoÂtlantrc Convoy

Planet Miners Lords of Karma Empires of the

Overrrund Conflict 2300 Acquire Display Lists Horizontal / Vert,

Scrolling „ . „ Player Missile Graphics CAS <u£ BficsofAmmanon " CAS >«£ JWUppmg g j § 16k

Memory Master Map 16k

f T T T T T ^ M ^ ^ ^ ^ ^ ^ ^ ^ ^ __ •

JUST IN F R O M T H E U 5 A !

Crush, C ^ ' ^ ^ ^ o n , , . ! ,

DISK 32k

Ricochet tha, allows you to

Dngona Eye h ^ tê battle Adventure game wun lot" g r a p h i c s . £19.95 jS^k 48k S S S S W C interplanetary adventure game. £27 .95 CASS DISK 32k adventure game ^ CASS. DISK 32k Rescue at . to u v e the prisoners. You have only 60 nuns to save y fcl995

C A S S D I S K 32k

S ' s S c e S e s c e n a n o s o r c r e a t e y o u r o - ,

C A S S D ISK 32k Datestoae* of Hy* chas ina to retrieve 20 nuns of fighting ana cnasmg the gems £13.95 C A S S D I S K

her hand 1 eye coordination game involving a manoeuvrable cannon which you use to ahoot down various targets Excellent uae ol colour and *ound I7 .K

Capture Draw the robots into tha landmines and electrified fences while avoiding their sole purpose which is to capture you

£15.99 £11.99 £11.99 £9.75

£11.75

£12.49 £19.49 £19.49 £11.50 £16.7S £11.50 £11.50 £11.50 £11.50 £13.75

£19.75 £11.50 £13.75 £13.45

£13.45 £19.45 £13.45 £13.45 £13.45 £4.95

) correct answers with a colourful display

day you wish your chart to begin The VIC will plot three weeks of bwrnythms lor you on the screen and than pause until you tell it to proceed or start a new chart Your physical, intellectual and emotional cycles are plotted in different colours wtuch really create an interesting and informative display U.»5

< expaniion required This program wili create and manage a household inventory lor insurance purposes Tracks purchase dare, cow description and location Will total values and pruit

a screen or printer <14. W

It expansion required Allows you to create sndmanage your . ivn dais base You can define the number of items in s record and add. change, display, delete, search. son. print, etc. Your daia can be stored on cassette whan not w uae 117.W

! Portfolio Matua &k expansion required Tracks last 8 values of each Mock and plot* trend curves on screen Provides complete analysis of your portfolio including number owned, purchase dale, coal, value. sFjii^ciation yield, etc IJT.SS

Hrusgtme allows the Astronaut' to take over the control Lunar Excumon Module as it is making Its descent to the

i MbnMM moon The program provides inlormanon via screen displays depicting amount of propulsion. fuel remaining, height and descent speed In addition the LEM is displayed as it descend* to the surface. If the astronaut is not careful, the module can be damaged or even totally destroyed upon imped t7.W

. is a two player game requiring manual skill and dexterity as you attempt to trap your opponent and force turn to Crash The VIC will act a» your of ponont if yon dccrg tT.tS

n^j^mm^mmmmtmmam^m This game requires skuTas you attempt to knock out the various coloured bocks without nuanng the reluming bsll_ The deeper you succeed in breaking into the wall the hlg her the value of your score unol you break through and truly increase your *core See who can get the highest scon joystick version t 7 8 5

Las Veoassryle b S ^ T c ^ n t M h ^ T C serving ss dealer players can play againsi the house (VIC) utilising such Mrategv as Doubling Down' and controlling your bets Each card is displayed on tha screen In full colour The VIC provtdee an easy way to develop your SYSTEM' before actually going tt1

at itl! ^ i i • . The standard game of Paddle tennis with the option of th playing one or both sides of the net Excellent use of the colour n d sound capabilities of the VIC t7.»S_

ftôuînîh^^n^^m^ Bandit' See the wheels spin and the handle pull utiluing the VIC'S colour and sound capabilities You can really get «rm weary pumping In yow^

_ KenTartTnvadingthe Earth and it is up Jo you to deMroy them be Ion they land The tension increase! as you try to accumulate s lugh score. Joywck version

Just a small selection from our immense range is shown here. Send for our full price list of Software, Peripherals and Accessories. New titles being added all the time.

tt.M

Avenger ° n ,° ^ ( P a n I) «ar Battle dA.. Super Sot ^ M o n s t e r ,

R o a d R a c e Amok

S c f f i 5 —

Aben Blitz Stymath 3k EX.

Calculate payments, interest rates, remaining balances, future balance*, annuities and investments Calculates any unknown given the other variable* ol the classic interest formulas. Screen prompts step you through each calculation after e.actmg your purpose from a master m«nu O .W

simple addition and subtracton problems for the young user Uses giant number* on the screen and rewartU ^ I Wars — CAS

fc^ of Mars CAS

C o d e m a t L . — r->a»

ROM ROM ROM Rom ROM ROM ROM CAS CAS CAS CAS CAS CAS CAS CAS CAS CAS CAS CAS CAS ROM

VfcT^Bounceo^l"14^ CAS

S S ^ - Code Breaker § g

CAS v i s ~20 EH ^ J ^ i o n 3k EX CAS

I | Migle CAS

Defence CAS • CAS

£13.95 £18.95 £18.95 £18.95 £18.95 £18.95 £18.95 £18.95 £6.75 £6.75 £8.50 £6.75 £8.75 £8.75 £6.75 £7.75 £8.75 £8.75 £6.75 £7.75

£23.75 £7.75 £7.75 £8.50 £7.75 £9.50 £9.50 £9.50 £7.75 £7.75 £8.75 £6.75 £4.75 £5.75 £5.75 £5.75

£10.95

ORDER BY POST FROM:

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— • II

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PRICES INCLUDE VAT POSTArr' AND PACKING ' ÔSTAGE| please send me your l ist of 1

peripherals I and accessories 1 I AND ACCESSORIES. • NAME ADDRESS

I I I I I I I I II

i pALASET LTD 30. BAYFORD R D. I LITTLEHAMPTON. WEST SUSSEX |

, j j

ETmOiCOM WHO'S GOING TO WIN THE

WORLD CUP? In conjunction with the Sil ica

Shop, we are hoping to add a

little more spice to your World

Cup viewing this summer.

There's a chance to win an

Atari 2600 T.V. Games Centre

complete with the soccer car-

tridge, or a £100 to spend at the

Silica Shop, one of the lead ing

stockists of T.V. and electronic

games.

All you have to do is pick out

the World C u p c h a m p i o n s ,

runners-up a n d the b e a t e n

sftmi-finalist wh ich w ins the

third place play-off.

If you are spoilt for choice,

there will be no shortage of soc-

cer pundits eager to give you

their views on the matter.

And you only have to enter to

be sure of w inn ing something!

For on top of that first prize and

two consolation prizes of Atari

soccer c a r t r i dges or £30

vouchers, there is a £3 voucher

for everyone who enters. This

can be spent at the Sil ica Shop

1-4 The Mews, Hatherly Road,

Sidcup, Kent or by mai l order.

We're not e l ig ib le to enter but

if you want our advice it's: Scot-

land, England and Northern Ire-

land (but not necessarily in that

order). But you may want to

choose another combinat ion.

And if. in the unlikely case,

that our three make early exits

from the competition, then you'll

CU4IA

still have some interest in fol-

lowing the World C u p through to

its well-televised end.

You could even key-in our

own World C u p Manager g ame

and check to see if your predic-

tion runs t iue to form.

We have included three World

C u p questions which will be

used as a tie-break if the result

of the competit ion is so predict-

able that more than one reader

guesses correctly. And we need

to know whether you want an

Atari system and cartridges or

wou ld prefer a voucher , so

please fill in al l the entry form

below and send it off to the Sil ica

Shop. To receive a £3 voucher,

include a stamped addressed

envelope with your entry.

COMPETITION RULES 1i No employees of Computer & Video

Games, Silica Shop, or their relatives may enter the competition.

2i All entries must be on the original coupon, not a copy thereof. Entrants must complete the entire entry form to be eligible.

3i All entries must be postmarked no later

BRAINWARE ANSWERS The answer to our May Mind

Routines problem is Quest ion

one, 5011; Quest ion two, there is

no solution to this one; Quest ion

three, 4,630,907,663.

The correct solution to last

month's Nevera Crossword is

printed right and the winners'

names will be publ ished in next

month's issue.

For more puzzles to tax your

brain turn to page 17 for this

month's Mind Routine a nd Nev-

era Crossword.

H L A N G U A G E

| O | A B | L | R |G A L A X I A N

I g B B I I o O | M o d e

i j h f T A C K E R

i | R | M U

R O N | N

S O L D

l o ^ H o

f | w IT AIT I O N

than June 12th 1962. Any entry which is incomplete, il legible or late wil l be disregarded by the judges.

4» The judge s decision is final and no correspondence wil l be entered into. In the event of a tie the first correct entry drawn wil l be the winner.

5) Only one prize per entry wil l be awarded and no cash alternative will be offered.

6i Vouchers are redeemable either by visiting, the Silica Shop. 1 4 The Mews. Hatherley Road, Sidcup, Kent or by mail order. Vouchers are valid up lo 30th October 1982

7i Winners wil l be notified by post A list of winners wil l be printed in the Sept ember issue of Computer & Video Games.

" WORLD CUP COMPETITION

Using your skill and judgement write down who you think will finish

WINNERS

RUNNERS-UP

THIRD PLACE. in this year's World C u p com-

petition?

1) Wh i ch country current ly

holds the World Cup?

2) Which is the only country to

have won the World C u p three

times?

3) Who is the only player to

have scored three times in a

World C u p Final?

Do you already own a T.V. game? if so which system do you own?

It you win would you rather have the Atari TV Games Centre and cartridges or the voucher? Game • Voucher • (please tick)

Name: .

Address:

Post Code: Send your entry, enclosing an S A.E. to: World C u p Competi t ion, Sil ica Shop Ltd., 1-4 The Mews, Hatherley Road, Sidcup, Kent DA 14 4DX.

Closing date for entry is Friday ^June 12 1982.


THE SYMBOL OF VALUE N A S C O M

KITS Nwn l.wlf MAS-lTSi HHPIG Nuco*> 2. no vW RAM BOARD LEVEL

NASSYSIMuRIO NiKtfn 2, no yM* MW CAUD SYSTEMS Njxq" 3. tw w* RAM tKwRAM 1t* IAW MM 3KuW>RAM iKalvlAM POWER SUPPLY lUfonn MEMORY C A R D S RAM I nwnory cjnj M>l« ram - te RAM B "Wrtvor •nth 14A RAM

Asa-i«ml 32K RAM U O B O A R D S VO boW) <or I • MO. I.CTC.l.UAKT (kill • , MO

CTC lor >bo-« I/O UAKT tar ihxi ifO DISC SYSYIMS Sworn IM0* »K OSOKBl .xi 'DC tt'O NjKOf* dull d<K •w.ilSORBtxM id FDC ttt4 NA5 DOSdw: opiyKH"

(iil» (JOJSO

tiuoo cm so

£338.-40 iwoo (10 SO C 101 SO £117.00

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ATARI

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Onk •m BAM JoyUJkl Ipjirl But* Dnkaltai IS) AMonHtr (•«» SpK* kwxbn 'ROM I WRj'«ii«OM Hiilic Cowiwid fROM i Au*fl»* iROMi Inviuiion u Pro|ri»»niflJ HI InvitMWW Programming ill IbuCh Tjrping C«w«niU>njl fwh 0»wnm«: Gumifl

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CBM VIC PASCAL M-doo* (11 »S CBM VIC Progrvn lh« M0 Your Iwst Cwiput**

C11.M (J 75

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Bamc ftASlC <B4l m, ram c wif-at* % BASIC ftuvnm Mlwvt t? os 14KRAM Cmi<4(4 % BASIC C«nM tSH fojntwufi Ajtf % BASIC Camp Prop

HvlmtCuH (SIS jOyUICk CL

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ctts

VK SOFTWARE at ts.*s Introduction to B*mc 0 CPrM Uwr'iGnx* A,«nfwt (ROM) U.

o 2

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U. o 2 Cm P»rw« ontk BASIC (».n

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BOOKS • MKTOSWO ItftrntiMori Ma tot Vol 1

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$ f Btiv Corvapti (1010 P'Of Appall Ed f 11.40 McrowllBASK (B7S Affil# BASIC t>iu Mor. BA'Jf Cm (4 It III* Projrimm sy (in Mo%ll, BASIC Hihi i w«t« Appta.Aopi.il tf« MiCft>-<ont|KII"*| in Moul, BASIC

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YOU'LL VALUE OUR EXPERIENCE YOU'LL VALUE OUR PRICES

SRS MICROSYSTEMS 4 » 161 •rwnlryRoad,CMxtrf h.'j 4XA

TriWhorw 01.1*1*040 Osw*nori-Slt. 11)0

t.Fotrtm u* >OU U HMO mtunnuui H i l l

ARCADE ACTION

for TRS-80

Model I & III A N D VIDEO

GENIE

Oeatf> enqu«*te* A nnw

Donr ti ijfT it yOt• ' *rt *Hirv yood wtt-A t|»r for IRS 80 Aoo»e «twr ltip'OvA"<v> lot marbling both >r. Europe ••mi It* U S

AIR ATTACK Presenting a new dimension in Arcade games The THIRD, Defend an East Coasl Town against Fighters. Bombers and V. 1 's. it <, the best Arcade style A j A ftC game available | ^ ^ J anywhere TRS 80 Modal I & 111 Laval 2 C«»»»tt« 16k

FROG RACE Afrogs life is a hard one; They've built a six lane Motorway right next to the crocodile infested river, that you must cross to get home1

Can you help a poor Uog out. and maybe pick up a girl I tog on the way TRS 80 Modal I & III Laval 2 Cassaite 4k & 16 k

MOONBASE RESCUE Somewhere in the Dagma system a group of Astronauts need your help- Can you steer your I V A down ihrough showers of meteors to the moons surface and return to dock with the Mother Ship TRS 80 Modrtl Laval 2 Cassatte 16k £8.95

£5.95

ALGRAY SOFTWARE

'All prices include VAT and P/P.

Algray House, 33 Bradbury Street, BarnsJey, South Yorkshire S70 6AQ

Telephone: (02261 83199

SCREAMING FOUL UP ft


® ® © ( G ) ® ® ® Q 0 © Q Q ® ® © ( G ) ® ® ® Q 0 © Q Q A T T E N T I O N A L L A C O R N ®

( 5

© o o 3 0

•

® O Q 0 0 Q

C H E S S 112K) Improved graphic* play* M a t h W wh>ia rrud game 'evei change* loo* ahead up to S m o v i t offenatve no i r t i i i t t d * ' » n i t v « pi«> 10 t u b level* ce t t l i ng i n p n u n t by p l i T f ' R « i k U i t l t ga l m o * * * Take t"< * c « m o v f i Er act ion i ^ p ' l v iMth H U over $41 ap problem n a m * * £ 7 9 5

A I R A T T A C K Command an Can C oa*t w i n artcrah battery Oei t rov enemy f i gh t *™ bomber* and i loodlp hug* Ingen.gu* graphic* depict p lane* approaching vaaf ing and f ly ing ol f Saarch the I> 1 and an the M nd ic ape through 360 deo* GOOD SOUND GRCAT ENTERTAINMENT

£ 7 9 5

S P A C E F I G H T E R (BK + 3Kgr ) Supar High i paan Defender aamih lype* o< mtv lbgan l i l i t f l l Repeating later cannon, w n i n bomb* hr-*core ranking*. bonu f p o m u 6 *k i i l level* t»ciT.' ii *ound effect* £ 7 9 S

C O W B O Y S H O O T O U T ( 1 2 K | Full F i i i g n . t w o p l i f t f arced* *hoo tmg gam* Cactu* ptania wagon* an.malad c o w b o i * Superb graphic* end sound £ 6 9 5

A L L T H E E X C I T E M E N T . INTR IGUE AND F R U S T R A T I O N OF A W A I N F R A M E A D V E N T U R E I 12K Eapiors the tonuous loreit* dark cavern % (* ceine duiifjeom

I he m«B ol Twitting tunnel* and the Jrin! wasteland* Outwit th* pitdnon Rncu* ih* PRINCESS end cwry otl the tiiiwiM G*e*l t» imagination art required | to play thr* excellent game b you may » atill navtf *«heu*t >11 th* poewbilitre*.

By deviling method* ol J eondeniong mfllagot the B author ft** been able to include many faatu'e* which , would oiherwi»e b« ivsilablf Only on much larger A computers St*'t youi Jt Mventur* now 17 95

(PACKED 4K EPROM) £24.50 • 1200 BAUD CASSETTE OPERATING SYSTEM * VISIBLE LOAD ft SAVE

• T R A C E ( X )

• I T R A C E • S T E P

F I N D V A R I V A R

R E A D D A T A

R E S T O R E ELSE W H I L E E N D W H I L E

I D E L E T E X . V D U M P

O N E R R O R R E N U M B E R X. V A U T O X. V C U R S O R X, V B E E P X . V KEY X I N K E Y $ X

H E X I H E X O F F

V E C T O R Z E R O P O P S T O P

• A

ALSO FEATURED IN OUR EXTENSIVE RANGE A R E -

WARLORDS- . 12K| Another High-speed arcadegame with the medieval touch Defend you castle and destroy your opponents Pt«y against computer or other player Exciting graphics tt. 95 M U N C H Y M A N iSKt Outrun the munchers lor p-jcknneni Eal your way to a high point score and confrontation with the SUPEHMUNCHERS E4.9S 3 D A S T E R O I D S |6K + 2Kgrl Steer through the rolling, hurl ling asteroids Excellent real life graphics£5.95 M A R T I A N S 112K + VIAl Use your torce held to Slop them landing Be*,ire * the impostors Cfi 94 " C L U N A R L A N D E R 112K1 Superb version o« this arcade game, including long * and short range scan* limited lu«l Supply C6.95 * >

h i g h scosi 60090

A S T R O B I R D S (12K) NEW version o l t h u incredible GALAXIAN type gama Fantastic •Ound e f fec t ! Scream.ng m i t t i l e t b ( w o o p m g b u d men NOW DOUBLE SPEED OPTION The b e n gam* on th* market £ 7 . 9 5

VIA C*e> requ«*dl taiUM tw any memory w* Goiltl enhance* ATOM e«**tmg lacrithea

Now available from many Atom Dealers.

ROM L E C T O R

I B O A R D

I Sw i tch between up to 4 ROMS located • i He* AOOO At* *m«i ied and tested wmt w i t h compact proleaconaMy produced K B and good Quality componen t * Fn* eauty into the Uti l i ty Socket iIC 2*1

O n l y £ 1 9 5 0

I N V A O E R F O R C E ( 1 2 K ) Terrific ver* ion of Space Invader 4 type* ot mv tde r * mother *h ip gtaat i o u n d h i -acot* 8 U i l l r.v.1* £7 95

^ L * WRITTEN ANY PROGRAMS! WE PAY 20% ROYALTIES FOR ATOM,»

r NASCOM & BBC MICRO PROGRAMS Deduct £1

per cassette when ordering two or more.

Send SAE for our Full Catalooue PROGRAM POWER 5 Wensley Road Leeds LS7 2LX Tel. (0532) 683186

Please add 55p order P & P + VAT at 15%

31S n ^i nil

w fffl

O 0 O Q • I3J (551

W

® ® @ ® ® ( A ] ® Q 0 0 Q O ® ® @ ( G ] ® ® ® Q 0 0 0 O 14 COMPUTER 8t VIDEO GAMES

T V .

G A M E THE GAME WITH SO CARTRIDGES

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TRS 80-GENIE SOFTWARE from the professionals

Mysterious Adventure GOLDEN BATON

TIME MACHINE " t e f i

)

Arrow of Death Part 21

Escape from Pulsar 7

' v . V . ' 1 '

* / SS frUjf

N O W — The second part of A r row of Death plus a new Adven tu re ! Escape f rom Pulsar 7 is the f i rst space Myster ious Adventu re . A r row of Death Part 1, already said to be one of the best 16K Adventures wr i t ten, is surpassed by the Part 2 edi t ion. A r row 2 carries on f rom Ar row 1 but is sel f -suf f ic ient . In Pulsar 7 you wi l l be de l iver ing Redennium ore to an outer galaxy when you pick up an interest ing creature for the tntergalactic zoo on your home planet, but what happens when the ore and the animal inadver tent ly come together?

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ROUTINES

Finding the pa thway through

this alphabet maze should set

your braincells buzzing.

Each square contains a letter

and a number . The number

shows how many squares can be

travelled to reach the next desti-

nation. You only "visit" a square

when you stop at it a nd take its

numeric va lue for your next

move.

S t a r t i n g f r o m s q u a r e S

( label led Start) a n d m o v i n g

either horizontally or vertically

— not d iagonal ly — by the

number of squares indicated,

you must visit each square on

the d iagram once.

No square should be visited

more than once and you must

finish at the G (labelled Goal )

square.

For example your path could

start: SXD IF . . .

What path should you take to

achieve your goal?

ACROSS 1. Lettuce function (3)

2. Getting the program working

with gravity on the end of the

french insect drink (9)

8. Game for a school teacher's

brain (10)

11. Ego init ial isation of data (2)

12. Ten inside ten buck and one

for I terminator (4, 1)

13. Jubilee LF CR? (7)

14. Flags produced by Vic (7)

16. Jump the beg inn ing of the

program (5)

18, Toot missing the ducks race

(2)

19. Take off the centre forward in

naval warfare game (3, 7)

22. Syntactical signif icances not

at charges (9)

23. Annoy the glitch (3)

DOWN 1. Letter sent by modem (13)

3. Gateway to the program? (5)

4. Comic proceed after break

(4)

5. Pint without quiet function

(3)

3

A 2

B c D

4

E I

F Goal H

3

1 J 3

K 3

L M

t

N 0 4

P i

0 R i

Start 3

T 1

u i

V W X 4

Y

B Q J J F F L H E E The champagne winners for our

Apri l issue are hemispheres

apart . We have one far from and

one close to, home.

The Mind Routines winner is

Mr J. Devine from Westvil le 3630,

Natal in South Africa, who cor-

rectly po in ted out that the

number of stolen bags was 1789.

The Nevera Crossword winner

was Mr S. F. Rischer of Russell

Court, Woburn Place, London

WC1 who was first out of the hat

with a correct entry.

Bottles of c hampagne are on

the way to them both.

Two more bottles of cham-

pagne are up for grabs this

month for the first two correct

answers out of the hat for this

Mind Routines puzzle and the

crossword below.

Please send your entries to

Computer & Video Games , Dur-

rant House, 8 Herbal Hill, Lon-

don EC1R 5JB to reach us before

June 13.

The a n swe r s to our May

issue's Brainware problems can

be found on page 11.

6. P lay Wizard ' s Ques t for

example , going around com-

ing high class King (2, 11)

7. Circular motions mixed into

rotas (9)

9. Anger c l ipp ing point from

the wire (3)

10. Enterprising crystal (9)

13. Our latin G INO system con-

tent (3)

15. Polish and erase (3)

17. Go-a singular 7? (1, 4)

20. One piece of hardware (4)

21. Basically assign or rent (3)

NEW PRODUCTS NEW PRODUCTS NEW PRODUCTS l\| E

MASTERMIND THE DEFEAT OF WARLORDS VICSOFT 7

Control Technology have just brought out seven good quality games programs on one cas-sette.

The first of these is Breakout — an extremely colourful version of the game with good sound effects.

Deathrace 2000 is the second game on the cassette. It is based on the film of the same name. During the game you have the unfriendly task of knocking down as many pedestrians as you can.

Sounds is a menu-driven pro-gram and is for more serious use than the other games on the cassette. It can produce all sorts of sound effects from sounds of nature to engine noises.

In Moniods you have control of an astronaut and you must dodge the asteriods that hurtle by him at terrific speed.

The Mastermind program runs along the tines of the original board game and i$ in full colour,

BEWARE THE WANDERING WUMPUS ...

Squash could turn you into a champion or make you feel like a born loser — just like the real thing.

Finally, Warlords turns you into the master of a castle that is being attacked with huge boul-ders. You have to try and stop these boulders from demolishing your castle.

Vicsoft 7 is available from Con-trol Technology on cassette. It costs £5.95 and runs on the unexpanded Vic-20.

The Wumpus is a deadly creature which lives in a cave system and no-one has ever seen a live specimen.

This is because the revolting Wumpus must be successfully tracked down and shot before the hunter actually sets eyes on him.

Suddenly the Wumpus is a very sought after creature. It smells abominable, but that can help the Wumpus hunter.

The object of Sharpsoft's new

version of Wumpus is to search for and kill the Wumpus. But your quest is made more difficult by deep pits and Superbats

At any time you may tumble into a pit and plunge to your death.

If you manage to miss the pits a Superbat may swoop down and pick you up. Once again you could find yourself falling into a pit. or into the open mouth of the Wumpus.

One concession you are given is an "I smell a Wumpus" warn-ing when you are one or two rooms from the beast

When you encounter the Wumpus you have one chance to shoot it with your crooked arrow, or die in the attempt.

Wumpus comes from Sharp-soft and the cassette costs £5.85.

SURPRISING ATTACKERS Critics of the ZX81 would not believe that an arcade game such as Galaxians could be transferred to the Sinclair — but now it has happened.

ZX Galaxians has all the usual features of the game. The Galax-lans move across the screen and you have to hit them with bullets from your base ship at the bot-

ZX GALAXIANS

WALKING THE STREETS OF SHAME It's naughty but nice I Holdco has brought out a game called The Naughty One which allows the players to indulge in all kinds of illicit activities in bars, gambling dens, and houses of ill-repute.

You can earn yourself a slave or get parts of your opponents bodies But paper money will not buy what you want — you have to use items of your own cloth-ing

The bank manager is no pin-striped figure of respectability either He is a pawnbroker. If you get into debt with him you could lose all your clothes.

THE NAUGHTY ONE You can undress your op-

ponents by gambling for their clothes, in auctions set up by the pawnbroker. You can go into big business with such profitable enterprises as massage parlours or worse.

You can also give out naughty tasks for other players to per-form. But be careful. The other players can do all these things to you.

But this is a game in which you can lose more than your clothes

You could also be seduced — and there are a few other sur-prises in store.

The Naughty One is produced by Holdco. It comes in two ver-sions. The mint or cassette ver-sion is available for the Atari and the ZX81 at £9 50. The maxi ver-sion comes on diskette and requires 48K. This is available for the Atari and Apple II. It costs £24.50

torn of the screen The Galaxians swoop down in

random formations and drop bombs, trying to destroy you. You have four lives which are indicated on a scoreboard at the right of the display.

The board also shows you who has scored the greatest number of hits in a game. The Galaxians also have the knack of surprising the player. One minute you think that you have nearly finished them off and the next more Galaxians arrive.

If you manage to score more points than anyone else has the computer will ask for your name and will display it in the highest score box until someone else beats it. The graphics are very good.

ZX Galaxians runs in 16K and is available on cassette from Artie Computing It costs £6 95.

ft ! u n n *<

IT 1 11*

Ml

NOW FIND A FRIENDLY MONSTER. SWORD OF PEACE

The king of a far off country has died and as his heir you must prove your worth by going down into a maze that is crawling with monsters.

Artie Computing's Sword of Peace is a classic adventure game You must move around the maze, entering sets of move co-ordinates, to find the objects of state These include the Orb of State, the Robes of State, and the Sceptre — and finally the Sword of Peace.

The game is played on several different levels. When you find an obiect you are automatically

transferred to the next level of the maze.

The monsters are divided into two catagories good and bad. You can actually have a good

vampire! To begin the game you are given a series of four spells which you can use against bad monsters.

Your first two encounters with

HOW THE KINGS AND PAWNS COME TO LIFE Many people have complained about the graphics capability of The ZX81 Now the seemingly impossible has happened. You can play high resolution chess on a Sinclair.

ZX Chess needs a few pieces of hardware to produce the graphics but the effect is really startling. The board display shows in clear detail actual chess pieces as they look on a real board and not just capital letter representation.

The hi-res graphics version

ZXCHE8S need three pieces of hardware. These are the Quicksilva mother-board, connector, and character generator. The price of these items is not too high for the eflects that you can produce.

It is also possible to play ZX Chess 2 without the enhanced graphics. There are seven levels of play. Four of these can be used within competition time limits. You get the option to play black

or white using all the legal moves including en passant.

ZX Chess needs 16K and is produced by Artie Computing and is available at £12 99

good monsters are very advan-tageous. Firstly, you are given a direction metre This tells you the number of moves you are away from an object. Nothing is ever that easy though

The direction metre only gives you one number to use. For a co-ordinate fix you need two, so you do not know whether you are moving in the right direction.

This is-remedted in your sec-ond encounter with a good monster. It will give you a direc-tion metre which shows two numbers. This shows you the number of moves you need to make in each direction before coming across the object Com-bined with the first metre it is invaluable

Good monsters can also teach you spells. They are not guaran-teed to work and you can lose a lot of points during battle When you have been through all the levels of the maze, and have all the Objects of State you can exit and are proclaimed as the new king.

Sword of Peace runs on the ZX81 16K. and is available from Artie Computing. The cassette costs £6 95

LA then this game is for you. All three games are available

on cassette from Kuma Comput-ers Othello and Chequers cost £10 50 each Casino is £5.50

THE EMPIRE STRIKES BACK TIE FALL OF THE ROMAN EMPIRE

Nero fiddled while Rome burned but now there is a chance for

you to change that city's history. The Fall of the Roman Empire

transports you back to Europe during the dangerous days of 401 AD. It allows you to play at being a Roman emperor for 30 years, or turns.

You have control of the vast legions of Rome and the cities that you have gained by con-quest. The people of those cities must pay taxes to you.

The only problem that you have is the little matter of invad-ing Huns, who launch attack forces at you from Germany

They attack your troops and cities, murder the people of your cities and burn the buildings.

From those cities that escape the Huns you may raise taxes to pay for damage done by the attackers. You can also replenish your battle weary troops, build-ing them up for another confron-tation with the enemy.

The game gives you 30 years in which to either rise or fall. You could find yourself reliving rather than changing history.

The Fall of the Roman Empire is supplied by Program Power and runs on the Acorn Atom The cassette is available for £6 95

EVERY ONE A WINNER! OTHELLO, CHEQUERS AND CASINO

Kuma Computers are really con-fident about their new versions of the three oldies for the Sharp MZ-80K. They want to know who the first person to beat their Othello or Draughts is.

Othello boasts good quality colour graphics representation of the eight playing board and 64 double sided playing counters.

The game is between you and the computer. As well as the good graphocs the game also has a quick response time and does not keep the player waiting too long when making a move.

The Sharp version of Che-quers, or Oraughts. also has a good response time. The colour graphics ard good, showing the traditional checkered board and pieces.

Finally, Casino is a new version of a game of Craps. Craps is essentially an American game which is played in the glittering casinos of Las Vegas. If you fancy yourself as a gambler and cannot afford the airfare to

I a

n r

E 9

MfiZOGS is a brand new game for the 16K ZX81, unlike any other game you've seen on the ZX81. This is without doubt the best game available for this computer, and if you don't believe us, ask somebody who has seen it, or go down to your local computer shop and ask for a demonstration.

MAZOGS is a maze adventure game with very fast-moving animated graphics A large proportion of the program is written in machine code to achieve the most amazing graphics you have ever seen on the ZX81

>bu will be confronted by a large and complex Maze, which contains somewhere within tt a glittering and fabulous Treasure. >bu not only have the problem of finding the treasure and bringing it out of the maze, you must also face the guardians of the maze in the form of a force of fearful Mazogs Even if you survive their attacks you could still starve to death if you get hopelessly lost. Fortunately, there are various ways in which you can get help on this dangerous mission.

There are three levels of difficulty, and the game comes complete with comprehensive instructions The cassette on which the game is supplied is of the highest quality, and loading is guaranteed.

Mazogs is available from Bug-Byte and most good computer shops at E10.00 inclusive.

100 The Albany, Old Hall Street, Liverpool L3 9EP

AMAZE ADVENTURE

GAME FOR

s i n d a i r -

ZX8I r — - n | Please t e n d me

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DON'T GET RATTY IN THIS MAZE RAT RACE

When it comes to sniffing out a npe gorgonzola, there's a new breed of Commodore mouse which is positively radar equip-ped.

Mind you, he has to be to survive in the dangerous mazes of Rat Race. One of the most compulsive and well conceived computer games around. Rat Race owes a great deal to the arcade game Rally X. Only the theme has been changed. Instead of racing cars the com-batants in Rat Race are a lone mouse and deadly rats and cats.

The mouse's aim is to survive long enough to consume every cheese m the maze. And he sets off at a cracking pace with three rats in close pursuit. To throw the rats off his trail he can lay a false scent which confuses them and gams him time. But use it spanngly as it takes up valuable time.

fP^' T

S e b

There are 10 cheeses in the maze, the first is worth 100 points, the second 200 and so on. But there is one super cheese which is worth twice the normal value and it is advisable to eat this one first as it doubles the score for all the remaining cheeses.

When all 10 cheeses have been eaten the mouse is given a bonus score for remaining time.

But you couldn't have a mouse game without a sprinkling of cats.

The black cats are sprinkled

through the maze, and although stationary, they must be avoided or they will cost you one of your three lives.

An ordinary mouse could not be expected to live for long in this environment but the Mousus Commodorous has evolved a sophis t icated radar system which displays the whereabouts of cheeses and rats.

The game comes in cartridge form for the VIC-20 and is pro-duced by Commodore. It is avail-able from its dealer network at £17.35 plus VAT.

ESCAPE FROM A DOOMED PLANET Watch out for this mammoth new game for the Apple II. Called Time Zone it lives on six disket-tes and allows the player to travel m time over several million years

The Earth is threatened with a war that it cannot survive. As a citizen of the planet you await your doom outside your house. The year is 1981 AO.

Near the house is a meadow

which you go to investigate. There is a strange round object in the middle of the meadow. You walk up to it and look round it cautiously.

There is a door in the side of the object. No-one seems to be watching so you gently push the door open. Suddenly reality

becomes blurred and you find that you are in time capsule. You could be transported anywhere.

The makers say that the game could take anything up to a year to play as both sides of the diskettes are used in the game, so you would need a lot of time on your hands in order to play it properly.

Time Zone is available from SB0 software and costs £49.95

JELLYMEN ARE A REAL NIGHTMARE JELLY MONSTERS

Children's parties will become a much more sinister affair after playing the game Jelly Monsters

The VIC-20 version of Packman goes under this name and fea-tures the monsters on its cover — and a pretty nightmarish bunch they are too.

With a maze full of dots, four monsters and four large energis-ing dots, the game follows the Packman format.

The small dots are worth 10 points each, the targe dots are 50 points each and whenever one of these is eaten, the chasing Jelly Monsters turn blue and you have a brief respite from their con-stant pursuit.

This is your opportunity to chase and eat them.

This is a Commodore cartridge for the VIC-20 and joins a grow-ing library of games in this form, presently standing at eight. Also new out are Road Race and Star Battle.

Road Race gives you a set time to travel as far as possible up a winding road, marked only by posts on either side. It is similar to the night driver arcade game

Star Battle is the equiv-alent of Galaxians with a hover-ing group of bat-like space crea-tures flying in formation at the top of the screen and a lone laser base firing from the bottom.

The Commodore plug-in ROM cartridges cost £17.35 plus VAT.

TV GAMES CENTRES TV GAMES CENTRES TV GAME! (

BECOME A KING OF THE ICE

ICE HOCKEY Experience the excitement and rough and tumble of ice hockey and w i thout col lect ing the bruises.

Ice Hockey sticks to the tradit-ional idea and comprises of two teams playing with a puck on the ice rink It's quite possible for the players to finish the game in a bloody fight which often hap-pens in real life games' It's even more likely with the absence of a referee and without any penal-ties given to the teams.

Both teams have a goalie pro-viding defence and a forward player to perform the attacking role. The puck can be passed from player to player and each one can shoot from various ang-les.

The players have a number of tricks up their shoulder-padded sleeves to outwit and out ma-

noeuvre their opponents. They can knock each other down in an unsubtle attempt to take pos-session of the puck, they can tackle in a variety of ways by body checking, and tripping, and they can also use their stick handling technique to win the ball.

There are also game variations allowing you to speed up the

movement of the puck tor an extra test or slow it down,

Ice Hockey is produced by Activision tor use with the Atari Video Computer System and will be on sale from stockists in June It costs £26.95, which is more expensive than others because of the extra memory used in writing the game and the greater sophistication achieved.

POWER IS THE NAME OF THIS GAME . . . A world war is being waged with one country trying to conquer the earth.

Two armies battle it out both on the video screen and on a board in this second game in the

• Master Strategy series for the | Philips G7000 games centre § In Conquest of the World a • knowledge of strategic playing is | vital. The object of the game is g for the two opponents to capture I as much enemy territory as poss

CONQUEST OF THE WORLD ible, using armies made up of tanks, battleships and sub-marines not to mention troops.

This is the follow up cartridge to Quest for the Rings in which you use a game board to position your armies and work out logis tics, while you watch land and sea battles take place on the screen.

The theme of this war game is a confrontation between the world's super powers in a bid to achieve world dominance Rep-resenting the real life relation-

ships of countries during the

early 1980s is the board, mapping out the lie of the land and the deployment of forces. Using the game board you can keep track of the whereabouts of all your troops.

When one of the players has conquered the o the r and achieved the position of world leader the game is over.

Conquest of the World is scheduled for a June release by Philips in the UK. The price will be £30 00 approximately

ATTACK OF THE ALIEN MARAUDERS GALAXIS

An advancing troop of alien marauders armed with deadly laser weapons are attacking your space xynter You must destroy the aliens before they get your ship.

In Galaxis you must tight off wave after wave of invading creatures.

This game is a version of the arcade game Galactica. Your ship is given three chances to build up the highest score possible. A series of invaders move across the top of the screen and sud-denly peel off in formation swooping down towards you

Mother ships also join up the invading ranks and these perform a similar swooping action in an effort to out-manoeuvre your space fighter.

Bonus ships are given when you reach a certain number of points and the game gets more difficult as it progresses. The more aliens you blast out of the sky and the more waves you complete the faster the subse-quent attack will be

This is the latest game out for the Interton VC4000 television games centre. It's a 4K ROM cartridge and can be found at Interton stockists for £19 95 from June.


E S CENTRES TV GAMES CENTRES TV GAMES CENTRES

ARCADE ACTION FOR ADVENTURERS AND SPACE ACES Atari is sticking to the winning idea of producing versions of popular arcade games.

Oefender is scheduled for release during the summer months and is a rendering of the arcade favourite. Planning to attract fans of the original game Atari is bringing out a similar version which will sell for £29 95 One of the more expensive games but it should be one of the more sophisticated.

Yar's Revenge should coincide with Defender's release date if

WHEN THE I WEST WAS WILD!

Youll feel right at home on the* range in front of your video screen as you attempt to lassoo a stampeding herd of cattle.

That's the idea in a newly released Activision game for the Atari video computer system. Out in the Wild West the number of cattle you owned represented your wealth. In this game you have to keep that number high.

You control a cowboy riding the range equipped with a las-soo He can only ride on the left hand side of the screen and at the press of a button he unleashes his lassoo to capture a steer.

This requires a good deal of hand and eye co-ordination to judge the distance to success-fully rope a steer correctly. The screen is f i l led w i th mul-ticoloured cows stampeding the range and for each one you las-soo you score a varying number of points.

Don't let any of them dash past your mounted cowboy and escape his rope, it means lost points. Your cowpoke can stop the galloping cattle either by rop-ing them or by riding up close to a cow and nudging her back.

Mavericks in the herd make things more difficult. They don't move at all so are bound to wander off to the left hand side of the screen eventually. These yearlings must be lassooed or

DEFENDER, YARS REVENGE, EUTOPIA, SPACE WALK things gu according to plan. This game is for gamers with a taste for Adventure, but further details are still under wraps.

It promises to be a test for experienced Adventurers though and also falls into the more expensive price bracket.

A game shrouded in mystery is due out from Ace for the Intel-livision television games centre. Called Eutopia it tells of the story of two islands positioned in the

middle of an ocean. The object of the game is to take command of the two islands, thwarting the opponents positions.

You have at your disposal numbers of men who can be deployed at various tasks. Your men can either build tactical plants or build shipping fleets.

For each conquest you make points are up for grabs Depend-ing on the condition of the frame, or the playing area, the score

you miss out on points. The magic score to reach is

1.000. Then you automatically receive a bonus horseman. Go for the black mavericks to quickly build up your points as they are worth more than others.

The cows move at different speeds and there are interesting features written into the game. When your cowhand's pony runs into a stray steer he'll give an almighty buck, and if he stumbles on a rock he'll trip up.

Various skill levels are avail-able and on the higher levels the cows move so quickly it really does become a stampede The Stampede is available from Activision stockists for £19 95

differs To further your cause you. as the ruler, can plant troops on the opposition territory Ace expects to sell this cartridge for £24.95

Likewise Space Walk, the other forthcoming addition to the Intel l ivision software series With four levels of skill to test your space adroitness you can blast various meanies from the skies.

There are a number of alien ships and beings for you to fight — including the deadly space ameoba, and the rainbow bub-bles which are filled with a lethal astrogas.

Both these games should be in the shops by the end of July, both retailing for £24 95 G7000 owners should keep their eyes peeled for a new addition to the games range. Already out in America, Monkeyshines is a game set to be a barrel of fun

FAMILY FAVOURITES Keep your eyes open for a new home games centre dedicated to arcade games.

Called the Hanimex Home Arcade Centre it will be on sale at the end of June.

Swindon based Hanimex is launching its new system with a total of 17 games cartridges, six of which are versions of money-spinning arcade favourites.

The Home Arcade incorpor-ates the handsets used by the Mattel Intellviston centre. These differ from conventional hand

HOME ARCADE controllers because they consist of a circular disc with which you make your manoeuvres. Others use a joystick device.

Retailing at around £89 Home Arcade follows in the footsteps of Hanimex's other video games centre, the Interton VC4000 According to Hanimex the new centre is based on a more advanced system than the Inter-ton.

Software for Home Arcade springs initially from a Hanimex team who then pass it on to an American sub-contractor which designs and writes each pro-gram. The manufacturing process is taking place at the firm's Swindon factory.

Scheduled for launch in June are versions of Phoenix, Defen-der, Crazy Climber, Pacman, Galactica and Beserk.

Plans are afoot to continue bringing out new games car-tridges for the new games centre which will be of an equally stan-dard and meet public demand Future releases include Cen-tipede, Jungter and Galaga

At the same time Hanimex will carry on marketing the Interton VC4000


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VH

There is more to chess problems

than: What Happens Next? It is

also possible to ask: What Has

Happened?

I left you with two "retrograde

analysis" problems last issue

with an invitation to look back

into the history of the position.

In figure one, the problem is

which side made the last move?

As w i t h m a n y r e t r o g r a d e

analysis problems, the key to

solving it is to ask what was the

last move. If you try this you wil l

find that white has no legal last

move — e.g. Pawn from b4 to b5

is not a possibil ity — why? But

Black has several e.g. Kd4-c5.

So Black moved last.

It might seem that program-

ming a reverse move generator

for Chess is straightforward, but

in fact it is extremely awkward .

Suppose that Whi te has a

Bishop on c8 say. It could have

reached there by an ordinary

move or by a capture. Alterna-

tively it could have moved to c8

as a promoted Pawn from c7 or

as a capture with promotion from

b7 or d7.

A Black Pawn on g6 might — in

general - have reached there

from f7, g7 or h7 but the one on g6

in figure one has obviously come

from f7. How can this obvious-

ness be programmed?

As part of an artificial intellig-

ence (A.I.) project, a researcher

in Britol, Br ian A l d en , h a s

recently wr i t ten a p r og r am

which reasons out the solutions

to quite a number of retrograde

analysis problems.

Among the routines used by

the program are the following:

PCMOV: gene r a t e s poss i b l e

reverse moves for a specified

side

LEGCHK: checks l ega l i t y of

reverse moves

1SKCHK: tests whether a King is

in check

KCHECK : i d e n t i f i e s m o v e s

which could have placed a King

in check

WHPCAP: de te rm ines wh i c h

men could have been captured

on a specified square

CPGTOB: tests whether any

pieces are constrained by the

Pawn structure

The ini t ia l version of the pro-

gram was written in RT-11 Macro

for PDP-11 c o m p u t e r a n d

o c c u p i e d a p p r o x i m a t e l y 5K

words of memory . A m u c h

improved and extended version

in POP-2 for a DEC-20 computer

is currently be ing developed.

Neither program is commercial ly

ava i lab le .

As an examp le of the program

in action, here is how it solves

last month's second cha l lenge

problem.

In figure two, the rightmost

P a w n h a s b een c a r e l e s s l y

placed between squares g2 a nd

h2. Where should it be? It is

White to move and you know

there have been no under-

promotions.

FT t t 1 J t f U «

• • i i • • •

• i © m % x % J

• b t d * t g h • b t d t g h

Fig i Fig ?

To arrive at a solution the

program performs the fol lowing

chain of reasoning. Since Black

moved last, PCMOV generates

al l possible reverse moves for

Black, name ly Nbl-a3, Nbl-d2,

Ndl-b2, Ndl-e3, Kc2-d2 a n d

Kc2-b2.

LEGCHK now checks the legal-

ity of each of these moves.

• The Knight moves al l place

the White King in check, so

these moves are e l iminated.

• Kc2-d2 places the Black King

in check by White's Bishop on

el — detected by rout ine

ISKCHK. Rout ine KCHECK

cannot find any legal way in

w h i c h W h i t e c o u l d h a v e

delivered check, so the check

is i m a g i n a r y a n d Black's

move is e l iminated.

• Kc2-b2 also places the Black

King in check. This t ime

KCHECK returns the follow-

ing possibil i t ies as to how

such a check could occur. The

Whi te Rook could have moved

to b5 — possibly with a cap-

ture. A White Bishop or Queen

could have moved from b3 to

c2, to uncover check, and then

be captured by the Black

King. A Knight move from b4

to c2 is impossible, since two

White Knights are still on the

board and there have been no

underpromotions.

The Queen moves from b3 to

c2, Rook moves from b3 or b4 to

b5 a n d non-cap tu r i ng Rook

moves from c5, d5 or eS are

e l iminated , since in each case

ISKCHK returns the information

that the Black King is still in

check. This leaves only a Rook

capture from c5, d5 or e5, or a

Bishop move from b3 to c2 as

explanat ions of the check on the

Black King.

Next, WHPCAP is used to

de t e rm ine wh i ch Black men

have been captured on b5.

• The captured man cannot be

the Black Queen's Rook, since

t h a t p i e c e i s f o u n d by

CPGTOB to be constrained to

move on squares a8 and b8

only.

• It cannot be the King's Bishop,

since that piece moves on the

wrong colour squares.

• It cannot be a Queen or a

Pawn, since either case White

would have been in check and

there is no previous legal

move by Black which would

e l iminate this check.

This exhausts al l possible cap-

tures on bS.

This leaves only one possibil-

ity: Black's last move was with

the King from b2 to c2, captur ing

a White Bishop which has just

moved from b3, d iscover ing

check.

The h o m e s qua r e of th is

Bishop is I I . If the carelessly

placed Whi te Pawn were on g2

the Bishop would be constrained

a nd unab le to leave f 1 to be cap-

tured.

The White Pawn must therefore

be on h2 in figure two!

By Max Bramer

ATARI SOFTWARE DYNACOMP FOREST F « E ' Using excellent graphic* and sound effect*, this s imulat ion puts you m the middle of a forest f i re Your |Ob is t o direct operat ions to put out ihe fire whi le compensavng for changes in wind, weather and terrain Not protect ing valuable structures can result in start l ing penalties. Life lake variables are p ro vided to make FOREST FIRE! very tuspensefu l and chal lenging No two games have the same sett ing and there are 3 levels of di f f icul ty 24K (C) £15 99

NOMINOES JIGSAW A j igsaw puzzle on your computer ! Complete the puzzle by selecting your pieces f rom a table consist ing Of AO dif ferent shapes NOMINOES JIGSAW is a vir tuoso p rog ramming ef fort The graphics are superlat ive and the puzzle wi l l challenge you w i th its three levels of di f f iculty Scor ing is based upon the number of guesses taken and by the di f f icul ty of the board set up

24K ( O C 1 5 99

INTRUDER ALERT This is a fast paced graphics game which places you in the middle o l the Dreadstar' having iu»t stolen its plans The droids have been alened and are directed to destroy you at all costs You must f ind and enter your ship to escape w i th the plans Five levels o l d i f f icu l ty are prov ided INTRUDER ALEUT requires a |oy*tiek and wi l l run o n 16K systems 16* (CI CIS 49

CHOMPELO CHOMPELO is really t w o chal lenging games in one One is similar to NIM you must bite off part of a cookie, but avo id taking the poisoned por t ion The other game is the popular board game REVERSl Tt ful ly uses thp Atari 's graphics capabil i ty and n hard to beat This package wilt run o n a 16K system.

16K (CI f 10 99

TRIPLE BLOCKARD TRIPLE BLOCKARD is a two to-three player graphics and sound action game it is based o n the classic v ideo arcade game wh ich mi l l ions have enioyed Using the Atari loysticks. the obiect is to direct your blockading line around the screen w i thout running into your opponent)* ) A l though the concept is s imple the combined graphic* and sound effects lead to "h igh anxiety"

16K(C)C12 99

SPACE TUT Use the game paddles to titt the plane of the T V screen l o ro l l " a ball into a hole in the screen Sound s imp le ' Not w h e n the hole gets smaller and smaller! A bui l t - in t imer al lows you to measure your ski l l * against o thers in this habi t - lorming act ion game 16K (CI C9 99

MOVING MAZE MOVING MAZE employs the game* paddles lo direct a puck t rom one Side of a maze to the other However, the maze Is dynamical ly (and randomly) built and is cont inual ly being modi f ied The object ive I t to cross the maze wi thout touch ing lor be.ng hit by! a wall Scor ing is by an elapsed t ime indicator and three levels o f play are prov ided 16K (C) £9 99

ALPHA FIGHTER Two excellent graphic* and act ion programs in one ALPHA FIGHTER requires you to destroy the alien * tar*h ips pas t ing through your sector of the galaxy ALPHA BASE is in the path of an alien UFO invasion, let f ive UFO'* get by 'and the game ends Both games require the joystick and get progressively more dif f icult the h.gher you SCorol ALPHA FIGHTER wi l l run o n 16K systems

24K (CI £11 99

THE RINGS OF THE EMPWE The Empire has developed a new battle stat ion protected by rotat ing r ing* o l energy Each t ime you blast th rough the rings and destroy the station, the empi re develops a new stat ion w i t h more protect ive r ing*. The exci t ing game run* o n 16K systems, employs extensive graphic* and sound and can be p layed by one or two players 16K (CI £15 99

SANTA CRUZ TRICKY TUTORIALS DISPLAY LISTS Teaches you how to alter the screen format of small and largr text o n the screen together and high and low res graphic* t « (CI C13 95

HORIZONTAL VERTICAL SCROLLING Enables graphics or text to be moved up d o w n or s ideways You could move only the text on the bo t tom half of the screen or create a map and scroll smooth ly over it. 16K (CI £13 95

PAGE FLIPPING Learn how to have the computer draw the next page you want to see whi le you are sti l l looking at the previous page then flip to rt instantly A very useful program 16* (C) £13 »

BASICS OF ANIM A TK>N. This p rogram shows you how to animate simple shapes (wi th soundl using Print & Plot commands and also has a nice Playor Missi le graphics game you can play w i th 24 * (CI £11 95

PLAYER MISSILE GRAPHICS Thi* p rogram * h o w s y o u h o w to create a s imple shape called a player, then takes you through over 25 examples to create a complete business appl icat ion and a smal l game 32K (C) £19 95

SOUND Unle** you have spent many hour * exper iment ing w i th the four voice channel* of the Alan, you wi l l learn a lo i f rom this one Wi th many examples of special sound effect* (CI £13 95

THE GRAPHICS MACHINE: Type in simple commands :ike line, boc. circle, polygon, fi l l and save screen to get hires pictures, you can save and retrieve in seconds Several demos are included in this great p rogram 48* ID) £13 50

PLAYER PIANO Turns your keyboard into a mm. piano. Create your o w n songs, save on cassette or d i tc , up t o 400 notes in memory 24K (C) £9 95

KIDS PROGRAM 1: Three programs o n one tape Math* test your chi ld's maths skills; Dialogue talk l o your computer : Lost Treasure search over a small island looking for a treasure 1 * * (C) £9 95

KIDS 2: Three more p rogram* for your chi ldren Spel l ing Bee. input and test those mon lh ly tests, jumbled up loners give a lot of fun. Touch, lo l low the computers instruct ions and stop yourself laughing 1SK (C) £9 95

ARCADE PLUS GHOST HUNTER Rid the mansion o n Huckleberry Hil l of Gho t t s Anrr< t ing. fast action, arcade type game u t i n g excellent sound and graphic* 16K (Cl £19 95

SPECTRUM GALACTIC CHASE A last act-on. arcade type game employ ing hi ret colour graphics Wave after wave of anackmg al ient must be destroyed m (h i t Gelaxian type game The display i t excellent 16* (C) £15 95

SCOTT ADAMS ADVENTURES 1, ADVENTURE LAND 34K(C>£1650 2. PIRATES ADVENTURE 24K (Cl £16 50 3 MISSION IMPOSSIBLE 24* (C) £1» 50 I VOODOO CASTLE 24K(C I£16 50 5 THE COUNT 24* (C| £16 50 6 STRANGE ODYSSEY 24K (C) £1* 50 7 MYSTERY FUN HOUSE » K (C) C M 50 8 PYRAMID O f DOOM 24K (Cl £16 50 9 GHOST TOWN 24* (Cl £ IS 50

10 SAVAGE ISLAND PART I 24K (C) CM 50 I I SAVAGE ISLAND PART II 24* |C) CIS 50 12 GOLDEN VOYAGE » K (C| C1S 50

NEW NEW NEW CRYPTS O f TERROR: An excellent graphics based adventure game Explore 50 crypts slay the monsters, f ind the r ing and the key lo the next level An excel lent absorbing game employ ing great colour graphics 1 ft* (Cl C29 50

MURDER AT AWESOME HALL: Quest ion suspects teerch for dues l ind the murder weapon. • * you wander through the doors of Awesome Hall' t ry ing to solve the murder of the Colonel Good graphic* and excellent g a m * feature*

i«K IC] C14 50

AUTOMATED SIMULATIONS Cnrth. Crumble ft Chomp Breathe fire, terrorise cities, snack o n a horr i f ied populace, four metropol i . five object ive* over 100 possible scenario* hi ret colour graphic* 12K (C) £22 45

Dragons Eye An outstanding int roduct ion to lantaty role-playing adventure! -combin ing s impl ic i ty w i th variety and rea l t ime battle graphic* Wil l captivate and entertain Tor hours 32K (C) CIS 25

Ricochet An abstract act ion strategy game Chal lenging thought provok ing and fast mov ing Work out tha angles avoid the obstacles Hi-res graphic*

IS* (Cl £14 95

Star Warrior Walk, j ump — even fly — over swamps, forest* and mounta in* w i th scrol l ing mad graphic*. Excellent graphic* Superb strategy game m which you try to tree an occupied planet 32K IC) £29 96

Temple o l Apshai Protect yourself mto the labyrinth See and touch tin-treasures. hear and smel l the creature* Discover for yourself the fantasy of Apshai Excellent, award-winn ing game 32K (C) £29 95

Upper Reaches of Apshai Cont inue the adventures of Apshai Four levels, over 160 rooms, gardens etc Monster* and evil nobglobins This game require* Temple of Ap tha i to play. 32tt (Cl CM 95

Rescue at Rigel Can you rescue the 10 pr isoner* be lore your power pack * deple ted ' Can you get back to your rendezvous point « t i m e ' Can you escape the dreaded clutches of the unmerci fu l High Tol lah MK (Cl £22 45

Invasion Orion: One-on one t t a r t h i p combat to ful l scale Armageddon in th i * chal lenging and excit ing space tactical warfare t imu la t i on Good graphic* and great ver*at i l i ty 2«* (C) CIS 75

Datestone* of Ryn Can you f ind and retrieve the dateatonet in the seemingly end tots maze of r oom* ful l of horror* . Great adventure role playing game

32K (CI CM 95

\

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Calisto Computers Ltd. To CALISTO COMPUTERS LTD. 119 JOHN BRIGHT STREET, BIRMINGHAM PLEASE ACCEPT MY ORDER FOR THE FOLLOWING PROGRAMS: 1

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GO TO WORK THE ZX81

Go is in essence very simple. It comes as no surprise therefore that the basics of the game are easy to program.

The short ZX81 BASIC program shown allows you to use your T.V. screen as a Go board. The program is no advance on the traditional board. It is merely a starting point for better things to come!

The most obvious extension is to add in the rules of play. A major element, capture, takes place when stones are closely surrounded by the opposing force. Wouldn't it be nice if we could make the program remove captured stones automatically?

At first s ight th is seems straightforward enough — the program must check that a single stone or a group adja-cent stones of the same colour — has no further liberties — adja-cent vacant points. But as with many programming exercises, there are logic traps just wait ing for the unwary!

First, we must consider more than one group, each indepen-dently. In fact up to four groups can, in theory, be captured by a single move. This extreme case is shown in the first two dia-grams.

A second tricky problem is how to get the program to iden-tify all the stones of a group without missing any. Then it's even trickier to get the program to recognise when it can stop looking!

The best solutions are often the simplest. Only if the program proves slow in practice need it be " po l i s hed " . O n e s imp l e method of detecting a group relies on copying that group on to an entirely fresh array call it the "capture" array — the same size as the board array.

The code for detecting a group should be written as a sub-routine. Then it can be used for each potentially captured group

adjacent to the last stone played.

The subrout ine can detect when it should stop and return to the ma in routine by using a repetitive process of "sweeping" its capture array. At each sweep it will either find another adja-cent stone to extend the group, or it will not, in which case it can stop!

Having used the subroutine to detect a captured group, it can also be used to check if the last move has attempted to capture itself. Such a move is il legal. Th is c a n be i n d i c a t e d by generating a noise or whatever else you consider appropriate!

A B C O E F G H J Fifl 2

DETECTIVE WORK. The Detection Subroutine

STEP 1: Clear the capture array. Put the stone which is nominated by the main routine, on the array.

STEP 2: For the last stone placed on the capture array, examine its adja-cent intersections on the board array in the order North, East, South and West. II any adjacent intersection is found to be vacant, exit from the subroutine with a "not-captured" result. II any adjacent intersection is lound to hold the same colour stone, i.e. it extends the group, then put this stone on the capture array and start STEP 2 afresh. If, however, neither a vacant intersection nor an extension to the group is found, pro-ceed lo the next step.

STEP 3: Examine the adjacent intersection on the board array for each stone on the capture array. II a new stone of the same colour is found, put it on the capture array and go back to STEP 2. If after examining all the intersections, no new exten-sion is found, return to the main routine with a "captured' result.

Figure 3 shows the order of detec tion ol the stones in one ot Ihe captured groups. STEP 1 puts stone 1 on the capture array. STEP 2 places stones 2 and 3. STEP 3 sweeps the capture array to find and place stone 4. STEP 2 then places stone 5. Finally STEP 3 fails to lind a fresh extension to the group and so returns with the list of captured stones.

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T G a M e $

DIAMONDS AND CLAWS Now that we have covered the basics of Adventure program-ming — pardon the pun! — we are ready to have a look at some of the intricate parts.

When you first started writing your game, no doubt the word SCORE seemed very remote from your problems. Nevertheless, most Adventure games have a SCORE feature, the score usu-ally being based on the number of treasures deposited in a spe-cial treasure storage location.

Let us code a score feature awarding say 10 points per treasure deposited in location LT.

First it will be necessary for the treasures to be recognised and not confused with "ordinary" objects. If obvious descriptions like DIAMOND or GOLD BAR are used, the player is probably in little doubt, but the computer won't be terribly impressed.

Therefore, all treasures in the object array should be grouped together in a block, say from 0$m) to 0$(n+m). The command SCORE can then execute a routine like:

SC = 0 : REM SC is score - zero to start count FORE I = (n) TO (n+m)

IF P(I) = LT THEN SC = SC + 10 NEXT

Ql$ = "You have scored"; SC : GOTO (start)

If the treasure descriptions are less obvious, like AMBER CLAW, then even the player may be in doubt as to its value.

A way round this is to identify each treasure with a special symbol such as an asterisk or a diamond alongside its descrip-tion, for examp l e * A M B E R CLAW*.

Thus, treasures no longer have to be grouped together in the array, although doing this will still help to reduce the scan of the object array. We can now have: SC = 0

FOR I = 0 TO (n) : REM Object array has (n + 1) elements IF P(I) = LT AND LEFT$(0$U).l) = " * " THEN SC = SC + 10 NEXT Q l $ = "You have scored"; SC : GOTO (start)

No doubt you are wondering if you wil l now have to type " * D I A M O N D * " to reference a d iamond that's a treasure. You don't, but I will explain the way round this next month.

A couple of points to beware of. The treasure stores will be frequently visited once dis-covered, and could well become a depository for all sorts of rub-bish as well as treasures.

When this location is visited and the objects present are dis-played, towards the end of the game the display variables may not have sufficient capacity to contain all the objects, or the amount of string space avai lable for the concatenation of these objects may be insufficient.

This may result in truncation of the object/treasure list, or cause the program to "hang up" whilst the machine searches for free str ing space , poss ib ly breaking with an Out of String Space error.

If the variables won't hold all the objects, establish more vari-ables, then work on the string space problem — increase it by a hundred or so. This may now lead to an Out of Memory error, in which case revert to the work-ing version of the string space, and restrict the number of objects that can be deposited at the location by l imiting them to treasures only.

To do this you will need to modify the DROP routine to detect the asterisk, and if not found reply with a message like " SORRY , ONLY TREASURES MAY BE DROPPED HERE".

Meanwhile, to round off the SCORE routine, don't forget to bring the game to an end if all treasures are home, by following the NEXT line by: IF SC = 100 THEN (clear screen):

PRINT

"Cong r a t u l a t i o n s , you have won" : END

Scott Adams adventures are always full of mystery and excitement, and have set something of a standard on the Micro Adventure scene. So it's about time we had a look at another of his works.

Savage Island, pad one, is one of the most devious games that I have played. The object is not to collecl treasures, but to obtain the pass-word needed to commence part two. Who could resist buying the sequel after such a struggle?

At the outset, one finds oneself on a deserted beach on a tropical island. A stroll around reveals an impenetrable jungle, a plain, a shark inlested ocean and an extinct volcano.

It all seems like a very routine exploration job. Even after working out how to keep at bay the bear who inhabits the cave at the top of the volcano — a problem that you will spend hours sweating over — things seem to be going quite w e l l . . . except for the lingering sense of

unease after having examined the stone head back on the beach.

But it s easy to torget about that, trying to survive hurricanes and investigating bangs and bumps in the night.

Is the island all it seems? Where are those vital tools we became certain we needed some two months ago and still haven't found?

There is indeed something very sinister afoot, and it seems our old chortling friend from Pirate's Island is lurking around somewhere. So startling is the finale to this first part, that having been clever enough to get the password. I can't wait to find out what happens in pari two.

Savage Island is published by Adventure International and verstons are available for TRS 80. Video Genie, Apple, Exidy Sorceror, And Atari computers.

I

TIPS ON DONKEY KONG

DON'T MONKEY AROUND WITH KING KONG! King Kong certainly grossed plenty ot money at the box office and now he's doing it again in the arcades.

The mammoth monkey is the star of Donkey Kong (also to be found under the name ot Crazy Donkey) the arcade circuit's cur-rent money-spinner

There are four screens to this game which features an attemp-ted rescue, by a cartoon charac-ter known as Jump Man, of a young lady in Kong's clutches.

For the beginner the game offers a rather confusing array of possible tactics.

The first screen shows Kong rolling barrels down a tilted array of girders, up which Jump Man must run to rescue his lady.

Points are scored for lumped over or hammer-squashed bar-rels. but these are not as signif-icant as the time bonus given foF

reaching the top of the screen — so give that priority.

The hammer is a double edged weapon, crushing barrels in the hands of a wielder but liable to disappear at the most misfortu-nate moments and also prevent-ing you from climbing.

Golden rules for this first wall known as: "Stairway to the Stars".

STREET TALK Although the name of the game is Donkey Kong, human perver-sity dictates that the hairy gorilla throwing things down from the top of the screen, should be nick-named "The Monkey".

Donkey Kong is a rich play ground for people who like coin-ing nick-names. "Conveyor belts" is a pretty common term for the moving stairways which give the hero a lift to the top of the screen or shunt him unexpec tedly sideways.

When the Jumpman goes on the rampage with the hammer, I have overheard the phrase: "Give em some steel" And the big stairway in the third screen is

are: don't wait beneath the edge ot a girder — you can't jump a falling barrel — and try to use the right hand side of the screen — Kong drops things straight down on the left Don't forget that you can always hide halfway up a ladder if in trouble.

The second screen seems more difficult but can be negoti-ated quickly for a big time bonus.

Little fires and things which can best be described as pies, form Kong's main threats in this screen of conveyor belts. For a fast time, run along the bottom of the screen to the right and go up to the first level

Leap on the conveyor belt when there's a gap and you'll find yourself travelling along to the fire fatal but there is a ladder above you and that is the way to safety. If you miss, it is possible to move along the con-veyor belt the wrong way by running jumps.

Up to the next level and some pie lumping needs to be done to get underneath the extending and contracting ladder Wait until it extends to the top - and Kong is not too close — to make your break tor home and a high bonus.

The third screen features lifts running up and down a central structure Take the lift up to collect as many objects

umbrellas, chickens and the like — as you dare then down and jump to the staircase Watch the falling missiles until you are sure of their pattern. Make your dash beneath them as they move to their furthest point from you.

The final dash for home is a question of finding the safe spots beneath the bouncing projec-tiles. These are just above the penultimate ladder and one cen-timetre away from the final lad-der Strategic waits here will see you safely home.

The fourth wall can have no set strategy as it is very random. Eight cork-like plugs are the key features which must be col-lected. These have the added bonus of restricting the fires' movement. When all eight have been collected the screen has been conquered and they can be done in any order.

Use the hammer on this wall to squash the four fires on the middle level.

After this the game repeats but becomes taster and harder. Remember: the longer you take the faster the fires get and beginners should watch out for a good time bonus at the top right hand corner of the screen: 4-5,000 is reasonable, but some machines offer only 2.000 and prove very difficult.

TIME TO TALK TURTLE Turpin is an everyday tale ot pond survival with a sprinkling of Russian roulette thrown in as well.

The hero figure is a turtle whose mission is to see six baby terrapins home to the turtle house.

There are eight mystery loca-tions around the screen which make up a maze and the six baby terrapins are hidden away beneath these.

The catch is that two deadly Snapper turtles are also hiding out beneath these locations

The Snapper's must be avoided which is easy at first as they roam the screen at random. But when they turn blue later they pursue the player.

The player can drop an egg bomb to stun a Snapper turtle but he only has three of these at the beginning of the game although three more are granted each time the player turtle :rosses the centre star

To earn a new screen the player must deliver all six terra-pins to the turtle house.

Turpin is a new maze-chase game which definitely should be placed in the "cute" category Fine graphics on a deep-blue pond background and the Snap' pars look suitably vicious

Points are scored for: deliver-ing a terrapin, 150; piggybacking a terrapin, 100; eluding a Snapper turtle, 80; and stunning a Snap-per, 50 points A bonus player turtle is awarded for over 5,000.

30 COMPUTER & VIDEO GAMES

DIG THESE CRAZY MONSTERS When it seemed that maze games were in danger of turning up one of their own dead ends, a new innovation has emerged.

The do-it-yourself-maze game goes under the name of Oig-Oug and features a kind of super allotment where all the action takes place.

The hero is a gardener, who comes complete with his own spade and a healthy appetite for "greens".

The screen shows a cut away

DIG-DUG view of the land and the player controls the gardener as he digs out a maze of tunnels.

His aim is to collect vegetables from within the ground and des-troy any monsters that try to thwart him

The monsters are a motley looking crew which seem to have come straight out of the darker recesses of the games

designer's imagination and live beneath the soil.

The only easily described creature is one which resembles a dragon - page 97 in the book of common garden pests.

They can be despatched by the gardener by dropping rocks on them or blasting them with his gun.

Points are scored for any mon-sters which our hero kills off and any tasty vegetables he con-sumes in the game

THE MEAN MACHINES ARE HERE! That ever-popular science fiction theme, the robots have taken over the asylum, has now been recreated story-book fashion in the arcades.

Robots, 'tie story goes, fed up with mankind's inept attempts at running Earth, decide to take matters into their own steely mits and, with a fair degree of death and destruction, set out to do just that in the new game Robotron.

As always m these tales, one man stands between the robots and total human oblivion — in Robotron, that man is you.

Armed with a robot-blaster, you are charged with the protec-tion of your family. The robotic hordes come in all shapes and sizes. The early ones tend to be small and easily despatched, the later models are bigger and more dangerous.

Certain varieties cannot be killed but only stopped for a time, others have the ability to turn your family into mutants.

The machine tells you the

story and how to play. The story expands to illustrate each new screen and describe the events.

The game is a cross between Berserk and Defender and you are represented on the screen by a human figure which is control-led by an eight-way joystick

Each screen is progressively

more difficult and by the third screen you have to deal with mutated family members.

Like Defender, the game comes from the Williams stable. It is due to be launched here at the end of May and is confidently expected to be a successor to the popular Defender.

Video games have ironically turned out to be a real shot in the arm for the pinball machines which once seemed in danger of losing out to the likes of space invaders.

The pinball designers, forced to become more innovative and imaginative to win back the play-ers are now producing machines which put the accent firmly on the skill factors and give dedi-cated players a chance to build up high scores without relying heavily on the run of the ball.

One of the new breed of pin-ball games is Hyperball which could herald the start of a new category of arcade games.

It has the familiar pinball fea-tures of backboard, play-area, targets and ball-bearings — but there the similarity ends, for Hyperball is not about keeping balls in play.

Instead the player is given two triggers which take the place of the normal flippers and let him fire the ball-bearings directly into playfield. It is a rapid fire theme that has already made Hyperball very popular in the U.S.

The playfield is dominated by an energy centre which is bom-barded by draining energy bolts. The aim of the player is to hit targets and prevent the lightning bolts from striking home.

The balls come out at anything up to 250 a minute and good players will make full use of this speed to protect the energy centre. Bonus points are offered for players who can hit targets which spell out words requested by the machine One example is "energy" which must be spelt out in sequence by dropping balls through correct holes in the deck.

It is a fast action game which rewards skill—but it is difficult.


r-

RUNS ON A SHARP MZ-80K I I 26K

RY TERRY ALLEN

WORLD (MP

It's halftime in the semi-final against Czechoslovakia and you're 2-0 down.

As the team troop back into the changing rooms you wonder whether you should change your tactics. The 4-2-4 system you elected to play seems to be giving the Czechs a lot of possession in midfield and your sweeper has been caught out twice by their tendency to hit early crosses to their centre for-ward Nehoda — who scored both the goals.

You seemed to have the easier task too, for in the first semi-final West Germany and Brazil — two of the teams you had fancied for the title — had battled to a 2-2 draw, with Brazil romping through 5-2 in extra time.

Luckily you had the fore-sight to get your scouts to compile a thorough dossier on Brazil and there ought to be no surprises when you meet them. Perhaps you'd have been better off sending a scout to watch the Czechs.

Well you'd better pull another player back into mid-field and also try to close down the Czechs' space in the centre — Panenka has been controlling the midfield.

And what about a substitution? Several of your players have been giving away possession .

It's not as though you haven't had chances, Morley was closest rounding two defenders before he shot wide, if that had gone in . . . 4 M M C" 4 » , U < 4 J 1 . P A I 4 • . 4 4 . 3 ' , C 8 ' . 4 < . 4 ' . P ? - 4 > . R < 2 4 •

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World Cup Manager sets out to give you all the frustrations of sitting on the bench when the national side you manage go a goal down 20 minutes from time in a crucial match.

And hopefully, with some careful attention to tactics and good substitu-tions in critical games, it should give you all the elation of guiding your country's team through to the cham-

pionships of the 1982 World Cup Finals.

The game runs on a Sharp MZ-80K in a massive 26K but is packed with REM statements and there is not a PEEK or a POKE in sight so transfer-ring it to another machine should not cause too many problems.

It w i l l let you manage any of the 24 countries involved in the 1982 World Cup but expect to have a more dif-ficult time if you pick El Salvador than if you choose Brazil.

It invites you to enter your team and then publishes the draw for the com-petition with initially six groups of four. Set out the countries you think wi l l be stumbling blocks to your con-tinuation in the competition and send off your scouts to watch them.

Remember you can get through by finishing second in your group so it may not be necessary to watch all three teams in your group. The first game comes up and a dossier on the opposition is printed out. Pay careful attention because you wi l l have to find good tactical answers to the opposition's ploys.

There are other considerations too. choose your formation carefully and if you need to boost your goal difference to qualify, try to manufacture an open g a m e . r u m f G p a g e 3 5

ISS

194

208

220

178

290 292

370 732 -WO Hit 420 440 480 499 500 510 515 513 520 530 540 560 562 564 570 5R? 568 582 590 680 610 *28 62-5 628

Goaei Kite; GO?>.€i»lO70 GOiUeil094 GOO© 11 l i d

12180 5400 12700 12e-l5

' I " "PLEASE CHOOSE '.•00ft TEAM" "ENTER * NUMBER FROM TH]5

1295 1370 6 70

E" XI HPE MhNhuEF Of

• ' . W P H I M I S TO W I N

•5-970 • ! TO 6

uOiue 60SI.IC S04U6 PRINT" PRINT* PRINT ENTER * NUMBER FROM THIS LIST"

G0=U6 gosub eosue FFIMT ^ IHT U hPE MANAGER Of ":h»<T> PRINT ".tiUP HIM 1 j TO -IIM THE 1982 WORLD CUP* GOSUB FOP t« S»0 V»FNA<24>

IF 6<V>< OTHEN GOTO 500

PM.S>»V IF S*4 THEM G0T0560 GOTO 500 fCXT I PHMT"B"> "THE WWW IS AS FOLLOWS" PRINT" " FOR 1»1 TO 3 PPINT " -PRINT * GROUP "lSTRtl Trte< 20)! "GROUP " tSTR*a*3> PRINT " " FCP J«I TO 4 PRINT Ot< M<I« J j ) t TA6<.20>: HJ <M< 1 +3. J • ' NEXT J HEXT I FP1NT " " FOR 1=1 TO 5000:HEXT I mum

1306 PRINT TAB^JSSTRf' I • 12> s " . " i At 178? GOTO 1320 !708 PPINT STR*'-I)J f 1309 GOTO 1320 1710 PRINT ITPt' I > ; " : A * !TABO0>rSTR*<-i + i2> i» . -tO*<I+12> 1320 NEXT 1 1322 FR1NT" " 1324 PRINT" » 1325 RETURN 1330 INPUT"UHICH TEAM"-'" : Tt 1735 T=UWL(T*' 1348 IF TO THEN GOTO1350 174 2 IF T>24 THEtj G0T01350 1744 GOTO 1370 1758 PRINT "PLEASE TVF'E A NUMBER BETWEEN 1 AND 24"

GOTO1330 1370 RETURN 7000 PRINT "8" 7010 PRINT "BfiPCELONA 8 th JULV 1982" 3820 PRINT " " 3830 PRINT "WOPLD CUP SEMI-FINAL" 7048 PRINT " " 7842 PRINT A«'S8<.I >JI" U. "sA*S8(3>> 3043 X3" 1 7044 GOSUB 9930 7045 XI *S8< 1 >:X2«S8<3> 7046 IF l»T THEN Z«X2iG0SUB 9O0O:E1=B:E2«C:GOSUB 4475JGOTO 3052 7048 IF >T THEN Z*X1JG0SU8 9000:E1=C«E2«B»60SUC 4475:G0T0 3052 705O GOSUB 4400 7052 M2< XI '=M2(X1) + I 3053 Ml tXI-6'«X2>Ml <XI•13 1=E1>M1<X1 «20>*E2 7054 M21X2'*M2(X2 »+l 7055 Ml X2.6>=<HMl<X2»13)»E2:i1I<X2.20J»Ei 3856 IF (Xl-T<*<X2-T• 8 THEN GOSUB 9900 3068 PRINT 3878 PRINT "SEUILLE Slh JUL.' 1982" 302O FPINT " " 5890 PRINT "WORLD CUP SEMI-FINAL" 3180 PRINT " • 3182 E2=0!E1=8 3184 PRINT wf S8<2^>!" U. "1A*<S8<4>> 7106 GOSUB 9930 3187 l=S8< 2 ->>X2»S8<:4; 718c. IF 1=T THEN Z*X2iG0SUB 9000:E1-&:E2=C:GOSUB 4475«G0T0 3112 :i09 IF : -T THEN T^XlsGOSUB 9800: E1-OE2-6I GOSUB 4475:GOTO 3112 3111 GOSUB 4400 7112 H2(X1>-M2<XJ)+l 7114 M2<X2>-M2CX2>+1 3116 hi X1.6)=X2:M1CX1. 13>»=E1!M1<X1 .28>=E2 7118 MI 2-6»*XI s Ml • XI . 1 7 -E2sm<X2,20>«El 7128 IF <X1-T.'»'X2-T>< >f THEN GOSUB 9900 3138 RETURN

630 GOSUB 9900 635 GOSU& 6000 652 GOSUB 5008 654 GOSUB 5I00 65e- GOSUB 9900 658 GOSUB 5208 660 GOSUB 4200 e61 liOSUB 3008 662 GOSUB 3208 663 GOSUB 9900 (>64 IF E2 >E1 THEN B2*X2:63"X1 665 IF El lE2 THEN B2-XUB3-X2 666 PR INT"E ":PRI NT"CONGRATULATIONS TO "tP*<B2> 667 PR I NT" 1962 UORLC- CUP WUtt«PS" 668 END 669 F*INT "E" 670 PRINT "NOW VOU MUST NAME VOUR TEAM " 6&0 HM K*C12> 690 PRINT "KEV IN THE PLAVER S NAMES AS PROMPTED1

700 GOALKEEPER " i l » l 705 GOSUB 14000 7I0 FOR 1-2 TO 5 720 DEFENDER "*STR»-:I-I> 738 GOSUB 14O00 740 NEXT I 750 FOP 1=6 TO 8 760 D$="MIDf IELD PLAVER "*-STR*(I-5> 770 GOSUB 14O00 7&0 NEXT I 790 FOR I T O 11 800 Dt="STRIKER "+STR*<1-8 ' 810 GOSUB 140OO 820 NEXT I 822 DM "SUBSTITUTE "U«12 824 GOSUB 14000 826 RETURN 870 END

1295 PRINT" " 1300 FOR 1=1 TO 12 1302 IF >:=J THEN GOTO 1310 1304 IF a - I ) * < T - 1 2 - I k > 0 THEN GOTO 1310 . 1305 IF T=l+12 THEN GOTO 1308

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3290 <M1 3202 PRINT "8" 3205 PRINT "MADRID J 1th JULV 1982" 3300 FOR 1-1 TO 6 3310 PRINT " " 3320 NEXT 1 3330 PRINT "1982 WORLD CUP FINAL" 3340 PRINT "==== • = = = « = =»=»»»" 3342 PRINT A*(N1<1>>;" V. " : f t l ( H I < 2 ) ) 3350 GOSUB 9930 3360 60SUB 9930 3362 PRINT "»" 3370 E1-0SE2-0 3380 X l«NKl> tX>Nl<2> 3382 IF X1«T THEN Z»X2iG0SU8 9606:E1-B;E2"C:6OTO 3466 3364 IF X2-T THEN Z"XH GOSUB 9066JE1«C»E2«B!6OTO 340© 3390 aosue 4400 3400 RETURN 3410 REM CHECr IF VOU'RE PLAVING 3420 FOR 1-1 TO U6 3430 IF<M<I.H2>-T)+<H<I,O2>-T>=0 THEN GOSUe 3500 3440 * X T I 3442 PETiIRN 3450 REM GET SCOUT'S REPORT 3452 D4=6 3455 IF 'Z-S1>*<Z-S2>*<Z-S3>*<Z-S4>«6 THEN D4-1 T460 IF D4-1 THEN J#«"V0UR SCOUTS HOME BEEN WATCHING "+A«<Z>JGOSUB 15606 3462 E-Z 3465 IF 04=1 THEN GOSUB 9966 3467 'IOSUB 8400 3470 RETURN 3500 REM SLOT IN UALUE OF OPPOSITION 3510 IF « A . H 2 > O T THEN Z - M ' I - H Z ) 3526 IF MTI.H2 >=T THEM Z=*MU.A2> 3536 GOSUB 9660 3540 RETURN 3300 REM TVPE I N O P P O S I T I O N TEAM

3olO PRINT " I " I PRINT "[>0 VOU WISH TO TVPE IN THE OPPOSITION PLOVERS' NAMES''" 3820 INPUT-TVPE V OR N "ID3* 3822 IF M?C<LEFT*' t'3»• 1 >)< >89 THEN GOSUB 12570! RETURN 3823 FOR 1=! TO 12 3825 PR INT "TVPE IN THE NAME OF PLAVER'U 3330 INPUT 29* 4020 RETURN 4206 PRINT ••'* 4210 PRINT "1982 WORLD CUP SEMI-FINALS" 4226 PRINT I S 3 H S E E E S I I I I I a E E l " 4236 FOP 1=1 TO 4 4240 PRINT * * 4250 NEXT I 4260 PRINT H*>.S8< 1 > >S TABC 16)( "U. 4278 FOP 1=1 TO 4 4288 PRINT " " 4290 tCXT I 4306 PPINT A*(S8(2)>ITAB<16>!"U. 4362 FOP 1-1 TO 6 4 3 0 4 PRINT " • 4366 f€XT I 4310 sosue 9966 4320 RETURN 4 4 0 0 REM PLAV "JEM I-FINAL. FINAL 4410 FOR 1 - 1 TO 9 0

4420 IF RRCU > >86 96THEN GOSUB 4666 4425 IF 1-45 THEN S0SUE 4960 4430 IF 1 10-INTCI.-10 .THEN GOSUB 4806 4 4 4 0 t C X T I

4450 IF El*E2 THEN GOSUB 4760 4460 PRINT "FINAL SCORE " 44-0 PRINT Af- :X1) !EI ! " " t A*(X2>)E2 4475 U5=U5+1 447t IF THEN RETURN 44S0 IF EI>E2 THEN N1<W5>«XI 4500 IF £2>E1 THEN N1(WS>-X2 4510 RETURN 4660 R7"RND<1> 4601 PRINT "B" 4662 R9»R<^l>/<R<Xl>*R<X2>>

JF R7-P-9 THEN 4666 4610 IF R7-R9 THEN J$»A*<XI>+" HAUE SCORED AFTER "+STR*+" MINUTES" 4611 IF 1-1 THEN J*=LEFT*(J!*,LEN(J*>-I) 4612 IF R7-R9 THEM GOSUB 15660 4615 IF R7<P9 THEN El =E1 • 1 4620 IF R7'R9 THEN J*=A«<X2>+" HOUE SCORED AFTER "+STR*(I>+" MINUTES" 4621 IF R7>R9 THEN G0SU8 15066 4625 IF R7>P9 THEN E2-E2+1 4627 G0SU8 9936 4630 RETURN 4T(K< PRINT "S" 4762 PRINT "AFTER EXTRA TIME" 47^5 R4=FNA<2> 4"10 IF R4«l THEN E1»E1*FNA<3> 4720 IF R4=2 THEN E2»E2»FNA(3) 4725 GOSUB 9930 4730 RETURN 4806 PRINT "B" 4865 PRINT "SCORE AFTER " J l ! " MINUTES " l " i " 4810 PRINT A*CX1>I" "«EH U " tA * (X2> l " "sE2 4315 S0SU6 9936 4820 RETURN 4^00 PRINT " * 4910 PRINT "HALF TIME SCOR£<"

":A»(S8<3>>

":AtfS8<4>>

Continued from page 33

Then it's out of your hands and the two teams are up against one another wi th a running commentary of events. Keep a close check on which of your players seem to lose possession and play badly, these are the one's you w i l l want to substitute. A good sub-stitution w i l l improve your play — a bad one w i l l give the opposition more chance.

Also watch for which team is gain-ing the most possession in midf ield— you may need to change your forma-tion or tactics here. Check on how the goals are scored — it could be import-ant to tighten up your defence to certain situations or to find out which of your own attacking ploys is paying dividends.

Half-time comes around and this is your chance to change your tactics if you have noticed things going wrong.

At the end of the day, win, lose or draw, you wi l t have to sit back and watch the other results of the day being typed out and see if your predic-tions are coming true.

And on you go, hopefully towards a place in the final.

The game is run on exactly the same lines as the World Cup with the winners of Group 1 going into Group A and the runners-up into Group C; Group 2 winners into Group B and runners-up into Group 0; Group 3 winners into Group A and runners-up into Group C; Group 4 winners into Group C and runners-up into Group A; Group 5 winners into Group D and runners-up into Group B; Group 6 winners into Group 8 and runners-up into Group D.

The first semi-final is between the winners of Group A and C and the other between the winners of Group B and 0.

4926 4930 4940 4945 4950 500O 5004 5005 5010 5011 5012 5013 5014 5015 5016 5020 5021 50?2 5624 5026 5027 5023 5029 5030 5032 5035 5040 5041 5042 5043 5044 5045 504b 5048 5049 5050 5100 5105 5106 5107 5110 5120 5130 5140 5150 5160 5165 5170 5189 5200 5205 5210 5220 5230 5249 5250 5300 5302 531» 5322 5324 5326 5327 5329 5330 5331 5332 5335 5340 5341 5342 5343 5344 5345 5346 5348 5349 5350 5352 5400 54IO 5412 5414 5416 5420 5430 5440 5450 5460 5470 5480 5490 5500 5510 5520 5530 5540 5550 5560 5570 5580 5590 5600 5610 5620

•»A*<X2>t" " IE2

' (D l» " JUNE ' 8 2 »

PRINT • " PRINT A#<Xl>t" " ( E l l ' PRINT " " GO SUB 9930 RETURN REM INIT IAL GROUP FIXTURES U6-6 Dl-12 H2»1s A2"2«GOSU8 5020 H2-3:A2-4:SOSUB 5020 H2-HA2-3:GOSUB 5020 H2-21 A2*>41 GOSUG 5020 H2=*l>A2*4iG0SU6 5020 H2-2:a2«3sGOSUB 5020 RETURN Dl -D l+ I GGSUB 3410 PRINT"I" PRINT -RESULTS FOP PRINT " " FOR 1*1 TO 6 H=M(I,H2>sft=H(I.0T> IF H-T THEN B-R2iC-P3«GOTO 5035 IF T-A THEN B-FZt C-P2' GOTO 5035 60SL© 7000 P R I N T "GROUP"H»" " ! A*(H> t Bl " "tA«<A>lC NEXT I IF OI - IE THEN eosue 7200 PRINT * " IF Dl-18 THEN RETURN PRINT "PRESS L TO DISPLAV LEAGUE TABLES" PRINT " ANV OTHER KEV TO CONTINUE" GET Zt IF : J « " TKM GOTO 5046 IF Z»-"L" THEM GOSUB 7200 RETURN REM PRINT GROUPS fi-D PRINT " • " PRINT "GROUPS FOR THE SECOND STAGE ARE i - " | PRINT • " FOR 1-1 TO 2 PRINT -GROUP "«CHR*<64+I-!TA8(20)1"GROUP "iCHR»(66+I> PRINT " " FOR J-1 TO 3 PRINT A*<62<I,J>>>TAB<20>lA*<62<I*2,J>> tCXT J PRINT " " NEXT I RETURN REM SECOND STAGE FIXTURES U6-4 01*27 H2-l:A2-2«GOSUB 5300 H2-3> A2- I '• GOSUB 5300 H2-2iA2-3JGOSUe 5300 RETURN REM SECOf© STAGE FIXTURES GOSUB 8310 GOSUB 3410 PRINT"®" PRINT "RESULTS FOR " I D U " JUNE '82" PRINT " • FOP I - l TO 4 H-G2*I.H2>:A-G2<I.A2> IF M»T THEN B*P2»C«P3tGOTO 5335 IF T-A THEN 6»P3«C-P2«GOTO 5335 GOSUB 7000 PRINT "GROUP "TCHFT#CJ*64>!" * f AKHJLBS" "LA$<A>>C «XT 1 IF Dt*29 THEN GOSUB 7200 PRINT " " IF D l -29 THEN RETURN PRINT "PRESS L TO DISRLAV LEAGUE TABLES" PRINT " ANV OTHER KEV TO CONTINUE" GET Zt IF Z»«-" THEN GOTO 5346 IF Z f - " L " THEN SOSUB 7200 DI -D l+ I RETURN REM GENERATE TEAM TACTICS FOR 1-1 TO 24 S5-FNA<3> S6(I)"FMfl<3> $7-FNA<3> T5-FNA<3>

T7-FNA<3> T8(I>»FNA<3> KXT I RETURN REM SET ASCRIPTION OF FREEKICK TACTICS IF F l - 1 THEN C«»" DIRECT SHOT " IF F l - 2 THEN C * - ' CHIP TO THE FAR POST -IF F l - 3 THEN C * - " TEE-(JF FOR SHOT " RETURN REM DESCRIPTION OF CORNER TACTICS IF F i - l THEN C»•- PLAV IT SHORT " IF F l - 2 THEN C*»" AIM FOR THE FAR POST • IF F l - 3 THEN C*- " AIM FOR THE HEAR POST -RETURN REM DESCRIPTION OF ATTACK TACTICS IF F l - l THEN C«»" FAST BREAK " IF F t«2 THEN C*»" EARLV CROSS * IF F l - 3 T « H CF«" SLOW BUILD-UP " RETURN

5630 REM MIDFIELD TACTICS 5640 IF F l - I THEN Cl=" TACKLE HARD ' 5650 IF F t "2 THEN C*-" MARK TIGHT " 5660 IF F l - 3 THEN Ct*' FIND SPACE " 5670 RETURN 5680 REM FREEKICK DEFENCE 5690 IF F l - l THEN C*»" MAKE A WALL " 5700 IF Fl«2 THEN C*- " MARK MAN-TO-MAN * 5710 IF F l - 3 THEN C*- " RUSH THE KICXER " 5720 RETURN 5730 REM CORNER DEFENCE 5740 IF F l - 1 THEN CJ-" MOl€ OUT FAST " 5750 IF F l - 2 THEN C*-" RELV ON THE GOALKEEPER " 5760 IF F l - 3 THEN Ci»* USE CLOSE MARKING " 5770 RETURN 5780 REM DEFENCE TACTICS 5790 IF F1=I THEN C U S E A SWEEPER " 5800 IF F l - 2 THEN C*«" INTERCEPT PASSES " 5810 IF F l - 3 THEN C*-" SHADOW ATTACKERS " 5820 RETURN 5830 IF F l - l THEN C*-" A 4-3-3 " 5840 IF F l - 2 THEN C*»' A 4-4-2 " 5850 IF Fl«3 THEN C*»" A 4-2-4 " 5860 RETURN 600O REM CHOOSE TEAMS FOR SCOUTS TO WATCH 6005 PRINT"8" 6010 PRINT "SCOUTS CAN COMPILE DOSSIERS ON 4 TEAMS" 6020 PRINT "ENTER Fi»UR NUMBERS FROM THE F-XLOWlHGi" 6030 PRINT "SEPARATED BV COMMAS" 6040 X-2 6050 90SUB 1295 6060 INPUT -fO70 IF r5 l -T>*(S2-T «(S3-T)**S4-T^=0 THEN GOTO6200 6072 IF <S1-S2)»'S1-S3>*-S1-S4 •<$2-S3)*<'S2-S4

(S3-S4>-0 THEN 6200 6080 IF SI 1 THEM GOTO 6200 6090 IF S2<1 THEN SOTO 6200 6100 IF S3<1 THEN GOTO 6200 6110 IF S4<. 1 THEN GOTO 6200 6120 IF S4>24 THEN GOTO 6200 6130 IF S3>24 THEN GOTO 6200 6140 IF S2>24 THEN GOTO 6200 6150 IF SI>24 THEN GOTO 6200 6160 RETURN 62O0 PRINT -RE-ENTER 4 NUMBERS FROM ABCH'E LIST" 6210 GOTO 6060 7000 PEM PLAVS TEAM H U. TEAM A 7010 REM MATCH SCORE IS 8 C

1 B=0: r * 0 7012 IF FNA<100 K60 THEN GOTO 7030 7020 B=H1(F(H).F(A>>:C=A1' F'H),F<A)> 7030 B1-FMA<8>»CI«FNA<8> 7032 Bi-Bl+R<"H)iCl-Cl+RcA) 7040 D=INT<<"ABS>:B1-CI >>'5 • 7042 IF D< >0 THEN 7080 7050 B-B+FNA<2>-1 7060 C-C+FNA<2>-1 7070 IF FNA(2>-2 THEN GOTO 7100 7072 IF R<H> >R<A) THEN B=6*FNA<:2>-1 7074 IF R(A>>R<H) THEN C-i>FNA<2'- i 7078 GOTO 7100 70SO IFB1 CiTHEN B-E+D 7O90 IFC! BITHEN C-C+D 7092 IF FNftCSMO 498 THEN B«B+FNA<3> 7094 IF FNR(500 » > 496 THEN C-C+FNA<:3 • 71O0 M2<H)-M2<H>»11M21A<-M2- fi' + I 7110 Ml <H>M2(H>>-A 7120 Ml •A>M2< A>>»H 7130 Ml H.M2H>+7)-6 7140 Ml Cfl.M2<A>+7)-C 7150 Ml <H.M2(HJ+I4>-C 716© Ml (A.M2(A>*14>=B 7170 RETURN 7200 PEN 7201 PR INT"JJCALCULATING LEAGUE TABLES" 7202 IF W6-4 THEN GOSiJB 8300 ^204 IF W6«4 THEN 60T0 72'.t' 7206 Kl*NK2-3« Jl -4 7210 FOR 1-1 TO W6 7220 GOSUB 7500 7230 GOSUB 7900 7235 IF W6+I-9-0THEN PRINT'BCALCULATING LEAGUE TABLES" 7248 fCXT I 7250 FETLtRN 7500 S:EM WORKOUT LEAGUE POSITIONS 7502 FOR J - l TO J1 7504 QCJJ-0:F9( J >-0sA9<;Ji-0«R9a>»0<W<J >*0iD8O>-0«D9< J>-0 7506- NE>IT J 7510 FOR J"1 TO J1 7523 T9< J)"M<I•J> 7^30 FOR K—K1 TO K2 7540 IF M1(T9<: J > , » T H E N GOTO7600 7550 F9<J>=MKT9'J>.K + 7 '+F9< J .'560 A9<J>®M1 (T9< J>pK*14>+A9'. J ) 7562 Z7-MKT9<:J>.K+7> 7564 26-MKT9CJ).K*14) 7570 D8<J>-Z7-Z6+D8'J> 7580 0(J>-C" J)+1 7585 IF Z7*Z6T«N D9< J )-D9^ J •+! 7590 IF 26<Z7THEN W<j>««cj>*i 7592 IF Z6< Z7THEN P9<JJ-P9C J <+2 7594 IF Z6-27THEN P9< J>-P9< JJ + l 7600 NEXT K 7605 NEXT J 7606 F2-0

7610 FOP J=1 TOJI-I 8650 7620 IF P9< JXP9CJ+I > THEN GOSUB 7300 8652 -630 IF P9< J.'=P9' 1+U THEN GOSUB 7700 : ^54 7640 NEXT J 8660 76=0 IF F2=l THEN GOTO 7606 8670 7660 PET URN 8672 ?r80 REM TEST GOAL DIFFERENCE 6675 7710 IF D8< J X 0 8 U + 1 ) THEN GOSUB 7800 8680 7720 IF D8<J>< >D8i J+1J THEN RETURN 8685 "730 IF F9<JXF9<J+i> THEN GOSUB 7800 8690 7740 IF F9< J >< F9<J+1> THEN RETURN S695 7?50 IF FNA (2 =1 THEN G0SU8 7300 8700 7760 RETURN 8702 7800 REM SWAP TEAMS POSITIONS 8705 7&10 F3 •=T9<'J •! T9> J >=T9<: J+l >! T9<. J*1 •1»F3 S7I0 7820 F3 =F9< J >sF9\ J.|*F9|. J+l >tF9( J+ l >"E3 8712 7825 F3 •R9<J)»A9<J>-A9:j+U«fl(9<J+I)"F3 871*; 7830 F3 «D8^J -:D8< J>*D8'J+i > !D80+ l :»-F3 3720 7835 F3 "D9<JJiD9<J>»D9<J+1>!D9(J+l>=F3 8725 -840 F3 -P9<J>:P9<J)-P9<J+n»P9(J+i)«F3 8730 7845 F3 «W<J>iM<J>=W<J+1>IW<J+1>»F3 8733" 7850 F3 =0<: Jj«0CJJ-0< J+I > :Q'J+n=F3 8740 7860 F2= I 8742 7S70 RETURN 8745 7900 REM PRINT LEAGUE POSITIONS 8747 7902 PRINT " " 8750 7904 Ff="F "1A4J="A " 8755 7965 IF U6=6 THEN B*=CHP*'I+43> 8760 7906 IF W6=4 THEN 6<=CHRJ(I+64 > 8765 7910 PRINT "6P0UF " r B*: " LEA6UE TA6LE" 3770 7912 FOR J=1 TO J l 8775 7914 IF F9'J>>9 THEN FM"F " 8780 7916 IF A9<J>>9 THEN A4t=>" A • 8782 7918 NEXT J 8785 7920 PRINT " " 8790 7925 PRINT TAB<20'J" P W D L "••FSiA4»; " P t * . " 8795 7930 FOR J=1 TO J l 8800 7932 P4f=14"! PS*-'1" 8802 7935 L9=0<. J>-W< J)-D9 f J> 8804 7936 IF Ff«"F * THEN GOTO 7990 8806 -937 IF A4*»" A " THEN GOTO 7994 8808 7940 V1»-STR*<J>+". "* f t»T9<J>> 8810 7942 PRINT u : TAB',20 toeJ) !H '«) [>9(J) tL9>P4»;F9< J;>!P5J! 8812

A9fJ>t" "fP9<J> 8814 7943 IF w6+J-5=0 THEN GOSUB 4000 3816 7944 I F W6=4THEN 7950 8 8 1 8 -946 I F J , 3 THEN GOSUB 8 9 0 0 8820 7950 F€XT J 8 8 2 2 7951 IF W6=6 THEN 7956 8824 ~952 IF t<4 THEN 7985 8826 -954 GOTO 7960 8828 7956 IF I<3 THEN 7985 8830

IF a - 4 ' + ( I -5>«e THEN 7985 8832 7960 FR1NT "PRESS AMY KEV TO CONTINUE" 8834 7970 GET Zt 8836 7980 JF I t«M W THEN GOTO 7970 8838 7985 RETURN 8840 -950 IF F9t J 1 0 THEN P4»=" " 7992 GOTO 7937 7994 IF A9<J K I 8 THEN P5*=" " 7996 GOTO 7940 8308 *1=4:K2=5:Jl=3 S310 FOR 1-1 TO 4 8320 FOP J«1 TO 3 8330 fl<I. J>-82 3420 GOSUB 5780 8425 PRINT" " 3430 PRINT " IN DEFENCE THEVtC* 8842 8432 PRINT" " 8844 844f> FI«S6(E)tG0SUe 5580 8846 S450 PRINT IN ATTACK THEY USE THE'tC* *843 8452 PPIHT" " 8850 8460 Fi=S7<E >i GOSUB 5630 8852 8470 PRINT "IN MIDFIELD THEY"IC* 8854 34-_ PRINT" • 8856 5473 IF D4=8 THEN G0SU6 9900JRETURN 3858 3480 FJ=T5' E IQOSUS 54€0 8860

PRINT IN FPEEKICKS AROUND THE BOX THEV USE A":PRINTC» •4 90 FI*T6' E>iGOSUB 5680 8862 5500 fF ! T "AND DEFENDING AGAINST FREEKICKS THFV"SPRINTC< 8864

tPRINT" " &8bh 5510 Fl»T7>E>iGOSUB 5530 8868 8520 PRINT-FROM A CORNER THEY"(C* 8870 8530 F1=T8(E' s GOSUB 5730 8872 r'4,t FF INT"WHEN FACED JITH A CORNER THE PRINTC*SPRINT" " S874 3550 Fl^F E^teOStJB 5830 8876 i'eO F*INT"THEV NORMALLY PLAY" tC f : "FORMAT ION" 8878 8562 PRINT" ' 3565 6OSU69900 9570 RETURN 8600 REM PRINT PAST RESULTS 0605 IF M2 E =OTHEN RETURN 8610 PRINT" " 8620 FflHT"RESULTS SO FAR IN WORLD CUP" 8622 PRINT" " S630 FOR 1*1 TO M2(E> >40 pFINTA«.£^Ml 'E. I + ^>!" H I P * < M < E , I <MMKE, I + 14>

NEXT I PRINT" " GOSUB 9900 RETURN REM SELECT TACTICS PRINT-S" PRINT "WHAT FOPMATION SHALL WE PLAY BOSS''" PR-1 NT" " FOR F1 "1 TO 3 GOSUB 5830 PRINTFlt" " tC f NEXT F1 PPIHT" " GOSUB 9960 F<T>=E9 PRINT" " PRINT"WHAT ARE THE DEFENSIVE PLAt<S BOSS^" PRINT" " FOP Fl, =>1 TO 3 GOSUB 5780 PRINTFM* "tC* tCXT FI PRINT" " G0SU8 9960 PRINT" " S5'T>=£9 PRINT"UHAT ARE THE ATTACMNG PLANS GUU?" P R I N T " " FOF' F1 - 1 TO 3 G0SU6 5580 PRINTF1!" "ICS NEXT F1 PRINT" " GOSUB 9960 PRINT" " S6<T>-E9 FRINT'UHAT IS THE MIDFIELD SCHEME eOSS'" PRINT" " FOP F1 -1 TO 3 GOSUB 5670 PRINTF1:" " iC f NEXT Ft PRINT" " GOSL© 9960 PRINT" " S7CT )=E9 PR I (-IT "WHAT IF WE GET A FREEMO- UPF1ELD BOSS'" PRINT" " FOP F1 «I TO 3 GOSUB 5430 PRINTF1'" " tC* r€::T Ft PRINT" " GOSUB 9960 PRINT" " T5<T)-E9 PRINT"HOW DO WE DEFEfO AGAINST A FREEKICtC"

M

PRINT" " FOR F1 »l TO GOSUE 5680 PRINTF1;" " !C* NEXT F1 PRINT" " GOSUB 9960 PRINT" " T6> T >=E9 PRINT"WHAT SHALL WE DO WITH OUR" CORNERS" PRINT" " FOR Fl «1 TO 3 GOSUB 5530 PRINTFll" " tC f NEXT Fl PRINT" " GOSUB. 9960 PRINT" " T7-T1-E9

RANK XEROX

LEADERS IN COMPUTER GAMES

ZX-81

FIRST CHOICE FOR ZX: SUPPORT:

ZX-80

QS DEFENDER. UP - DOWN - THRUST FIRE First and only full screen display Software to drive QS SOUND BD Moving Planetary surface. Up to 84 fast moving characters on screen at once. On screen scoring Ten missiles at once. Increasing attack patterns. Requires 8K ROM, and 4K min of RAM £.8.80.

QS SOUND BD. A programmable sound effects board using the AY-3-8910.3 TONES; 1 NOISE; ENVELOPE SHAPER; + TWO 8 BIT I/O PORTS Easily programmable from BASIC, the AY chip does most of the work leaving your computer free for other things. Signal 0/P via 3.5 mm Jack socket Ports 0/P via a 16 pin I.C Socket. £26.00.

QS CHRS BD./ A programmable character generator giving - 128 SEP-ARATELY PROGRAMMABLE CHARACTERS. ON/OFF SWITCH IK ON BOARD RAM Enables creation and display of your own characters to screen or printer. Demo cassette of fast machine code operation routines and lower case alphabet included. See below for ZX PRINTER listing. £26.00.

Q S - L O U C R C R S C

* t > e d « f 9 h i j k l f t n o p 4 r f i u v w x < t r

QS INVADERS. LEFT RIGHT FIRE 13x 7 INVADERS; High score; 3 levels of play: RND saucers; Bonus base; Drives Sound bd. & CHRS bd . Requires7K RAM, 8K ROM fSlow AS.80.

QS HI RBSBD. A Hi-res graphics board giving -256 x 192 PIXELS. 6K ON BD RAM. SOFTWARE SELECT/ DESELECT. MIXED TEXT AND GRAPHICS. 2K ON BOARD ROM Resident fast machine code graphics software (in ROM) provides the following HI-RES Commands. MOVE x.y; PLOT x. y; DRAW x.y; BOX x.y; UP; DOWN; LEFT; RIGHT; PRINT A$; SCROLL; BLACK; WHITE CLEAR COPY See above for ZX PRINTER listings using COPY £88. OO.

QS A S T E R O I D S LEFT RIGHT THRUST FIRE Software to drive QS SOUND BD. Multiple missiles firing in 8 directions. On screen scoring. Increasing number of asteroids Full mobility of ship to all areas of the screen. Two asteroid sizes. Bonus ship at 10,000 points Requires 8K ROM. 4K min of RA M + SLOW function £ 8 . 8 0 .

QS 3K RAM Bd. An extremely reliable static RAM Bd. which combines with the computer's memory to give 4K total. Plugs direct in to the rear port on your ZX Computer £ 1 8 . 0 0 .

QS MOTHER BOARD BD. fr QS CONNECTOR. A reliable expansion system allowing a total of any RAM pack plus two other plug in boards to be in use at once. On board SV regulator drives all external boards. Fitted with two 23 way double sided edge connectors. Connector Is 2 * 23 way edge conns soldered back to back Expansion can operate In two ways - (1) COMPUTER — CONNECTOR ~ Any QS add on bd. (but no extra RAM pack). (2) COMPUTER — CONNECTOR — MOTHER BI> — ANY RAM PACK (2 bds to fit in mother bd.) Mother board £ 12.00 Connector £4.00.

Special offers & news (1) QS Mother bd. + connector+CHRS bd + The special Graphics version of ARCTIC COMPUTING'S ZX CHESS 11. £48.00. The strongest chess program with 7 levels of play.

(2) QS MOTHER BD + CONNECTOR+either SOUND or CHRS bd £40.00.

We will be at the following shows ... Come and see us ... THE COMPUTER FAIR, Earls Court, 23rd to 28th. April 3rd ZX MICROFAXR, Central Hall, Westminster. 30th April G* 1st May POSTAL AND MONEY ORDERS TO: ALL PRODUCTS FULLY GUARANTED. QUICKSILVA: 98, UPPER BROWNHILL RD.: MAYBU8H : SOTON : HANTS : ENGLAND. Please state Type of machine. Which ROM, Memory size, when ordering.

r L V

887* PFJNT"UHPT ABOUT THEIR CORNERS^" PRINT" *

8881 FOP' FT =J TO 3T60SUE 5730 8882 PPINTFLT" " )C« 8893 NEXT F1 386-» PRINT" " 8885 GOSUB 9960 8886 PRINT" " 8888 T8'T>-E9 8889 RETURN

-08 ON I GOTO 8910. 8920>8930.8940.895C.8960 8985 RETURN 5910 IF J«L T«NG2-I,1>"T9<J> 3915 IF J-2 THENG2<3.l>»T9<J> 8918 SOTO 8905 9920 IF J - I THENG2<2>1>-T9<J> 8925 IF J=2 THENG2'4.1>-T9(J> • 8928 GOTO 8905 8930 IF J-L T V € N G 2 * 8935 IF > 2 THEM&2<3.2>-T9<J;» 5938 GOTO 8905 „5940 IF Txj THENG2<3,3)«T9<J> 3945 IF J - 2 THEN62< 1 , 3 > - T 9 < J ) 5948 GOTO 8905 8950 IF THENG2<.4,2>"T9< 8955 IF J - 2 THENG2<2.2)»T9CJ> 9958 GOTO 8905 ?960 IF T»I THENG2<2,3>»T9<J> 8965 IF ]«2 THENG2<4«3)"T9CJ> J968 SOTO 8905

PEM p lay GAME PRINT"®" JPRINTA*(T>1* u. "IA*<Z>IPRINT" " E*O:C-8i64«0iB5-0iB6-0

9003 G0SU8 3450 5004 SOSUB 8670 * » 5 GOSUB 3800 3010 23=01^4=0:W1*0 9812 *4-T4(S7<T>.S7<Z>>+30 9815 W3*P(T 1 * U4*PI Z) 1016 U3«W3*2*H1F<T>»F<Z> >»W4»W4+2*H1 <F(Z>»F<T>) 9017 FOP 1 = 1 TO 1 U U 2 >R<T> THEN Z1»Z * 3 2 IF 21 «T THEN 23»2 9034 IF 21-z THCN Z8-T ?04O GO SUB 9500 9050 r s i - " HAI€ " <052 SOSUB 9700 9055 FRINTA*(Zl>tZ8*i"POSSESSION" 985<s PRINT" " 9070 IF Zl -T THEN G0SU6 9760 •'080 IF Z l -Z THEN 60SU6 9780 '090 J»=25#+T4t<Gl >*Z6»iG0SUB 15000 i»092 PRINT" " W94 eosue 9930 9180 24-22! 23-Zl 9182 IF Z 2 - I THEN UL-UI+LIU2<A3>-U2<A3>M 9110 IF Z2-2 THEN GOSUB 9300 911: IF 1 -22 THEN GOSUE 19008 •<200 FCXT I 9201 H-TSA-Z K02 PRINT'MQTHING ELSE OF SIGNIFICANCE HAPPENS

DURING THE 6t¥1E" 9203 PRINT" " :PRINT"FINOL SCORE" 9204 PR INT " "SPRINTAt' T>»BJ" "SA*<Z>»C 9285 P2=6:P3=C

GOSUB 9900 9207 IF X3-0 THEN 60SUB 7100! RETURN 9208 IF 6-C THEN 9211 • 9109 IF i t -0 THEN RETURN 9210 SOSUB 7100! RETURN 9211 IF X3-1 THEN 9228 9212 2 3 - 0 : 2 4 - 0 1 * 4 . 1 5 9214 X5-1 ?:i6 PRINT"II*sPRINT "EXTRA TIME BEING PLAVED" 9218 6OTO9O20 9220 X5-0

PRINT-I-SPRINT -PENALTIES UILL DECIDE RESULT-SHOOTS WIDE-

9214 IP RNO< l> >.5 THEN B - B + l i J * - " SCORES FROM THE SPOT" 922b Jt*Kt< 1»FNA<10>>+J»sGOSU815000 9228 .'*=• SHOOTS WIDE* 9230 IF RFC< 1 > >. 5 THEN C - C + H J * - " SCORES FROM T « SPOT" 9232 « - 2 9 * < 1*FNA< 10^ W*<GOSUB 15000 9234 IF B=C THEN 9223 9236 PRINT-FINAL SCORE " 9238 P R I N W T) :B : " " iA*<ZXC <40 P2-e:F3-C 9245 GOSUB 9900 9250 RETURN -TOO REM SCORING CHANCE 9382 24-1 9303 63-FNA<7> 9 » 7 IF G K 8 THEN ZL * -Z6» I-09 IF 61 >7 THENZU-Z5* 9710 ON G3 S0SU6 9 3 5 0 . 9 3 5 0 . 9 3 5 8 , 9 3 5 0 , 9 4 5 0 , 9 4 5 0 . 9 5 0 0 9349 RETURN -750 REM NORMAL ATTACK 9355 &3-FNO<lO0> 9768 IF T3'S6VZ3XS3<ZS>>>I00-G3+e4 THEN 9400 9365 SOSUB 9375 9366 RETURN

9375 G3-FNA<9> 9380 21f -Z l * *A l»(G3> 9382 IF Z8-T THEN H * - - "+k*<)+FNA(4>> 9384 IF Z8-Z THEN H*»" "+29»<1+FMA<4>) 9385 IF 63(4 THEN Z1*"Z1*«-H* 9386 IF G3<4 THEN J*"2l*:GOSUB 15000: Z2-1: RETURN 9387 IF Z8-T THEN H*-" > 9388 IF 28-2 THEN H*-* "+Z9«<1> 9389 IF G3<6 THEN J*-2U«-H*: GOSUB 15000! RETURN 9390 ,I»-Z1*!60SUB 15000: RETURN 9400 REM GOAL IS SCORED 9402 PRINT " " 9404 B4=B4+2.5 9405 J*-Zl*+A2$<FNA<9>>:GOSUB 15000 9406 GOSUB 9410!GOSUB 9640 9407 IF I - M T«N RETURN 9408 PRINT"FROM THE KICK OFF" 9409 RETURN 9410 ;»=" IT 'S A GOAL' " * « * < Z l / + ' HHU£ SCORED"s90SL© 15O00 9413 IF Z l -T THENB-B*1 9420 IF Z l - Z THEN C-C+l * 9422 02-1+2 9423 IF RND<1>>,5 THEN D2-D2-1 9425 PRINT" " 9426 2 * - " MINUTES" 9427 IFD2-1 THEN Z * - " MINUTE" 9428 PRINT 'SCORE AFTER " !D2tZ* 9430 PRINT " " 9432 PRINT A t f T M B ! " "sA*<Z>tC 9440 Z2»l 944 9 RETURN 9450 REM CORNER 9452 PRINT" "> PR INT A*CZ l ) t " UIN P CORNER" 9435 PRINT" " 945^ IF ZL-T THEN Zl*-k*C5+FNA<6>> 9458 IF Z l - Z THEN Zl«=Z9^5*FNA<6>> 9460 J$-"FROM THE KICK THE BALL REACHES"*" "*Zl*

i GOSLIB I5O00 9463 63-FNA<100> 9470 IF T2<S6<23>.S3<Z8)>>100-63+B6THEN B6»86*2iG0T0 940O 9473 SOSUB 9373 9499 RETURN

. 9500 REM SET-PIECE 9502 PRINT" " 9510 IF Z l -T THEN Z5*-Z9»a+FHA'"4> > 9512 IF 21-2 THEN Z5»=M(1+FNA<4»> 9514 J*»Z1*+" IS BROUGHT DOW BV "•Z5*+".THE REF

AUARDS "+At (Z l> 9316 J t - J « * " A FREEKICK JUST OUTSIDE THE BOX'tGOSUB I5000 9520 PRINT" • 9323 PRINT"FPOM THE FREEKICK " 9530 G3-FNA(100) 9332 IF T3<S6<Z3),S3<Z8)>>100-G3+B5 THEN B5-B3*2!GOTO 940« 9334 GOSUB 9375 9336 RETURN 9600 REM DETERMINE PLAVER TO PRINT 9640 REM BRING ON SUB^ 9645 IF Wl-1 THEN GOSUB 9980!RETURN 9647 PRINT-PRESS S TO BRING ON SUBSTITUTE" 9648 PRINT" ANV OTHER KEV TO CONTINUE" 9649 GET It 9630 IF 2» - " " THEN 9649 9651 IF ASC(Z*><>83 THEN RETURN 9635 PRINT"®" 9636 Wl-1 9660 FOR J-2 TO 1UPRINTJ*" "tk*<J>iNEXT J 9665 PRINT"PLEASE TVPE A NUMBER FPOM 2 TO 11" 9666 PRINT"TO INDICATE THE PLAVER TO BE SUBSTITUTED" 9667 INPUT K 9668 IF K>11 THEN9667 9669 IF K(2 THEN 9667 9670 PRINT" ":J«-K»<K)+" TRUDGES OFF TO BE REPLACED BV "

•M<12>I30SUB 15000 9673 2»-Kf:K)iK»<K>-K*<12)»K*<12>«Z* 9680 W3-W3*<-<U1"'10>+U2(K>>*2 9683 RETURN 9700 REM DETERMINE IF POSS. REGAINED 9710 REM IF Z I O l THEN RETURN 9720 IF Z 4 0 1 THEN RETURN 9738 IF ZJOZ l THEN RETURN 9740 28* - " REGAIN -9730 RETURN 9760 REM GEfCRATE 2 RANDOM PLAVERS 9762 A3»FNA<-10> + 1 9764 Z5*-k*<A3> 9766 IF G1 >10 T « N 26*-Z9*<FNA< 10)*1 » 9768 IF G1>10 THEN RETURN 9770 A4-FNAU0' + 1 9772 IF A4=A3 THEN 9770 9774 26f-K»(A4> 9776 RETURN 9786 REM GENERATE 2 RANDOM PLAVERS 9782 A3-FNAU0> + 1 9784 Z3«-Z9*(A3> 9786 IF Gl>10 THEN 26t-K»cFNA<10>+l> 9788 IF Gl>10 THEN RETURN 9790 A4-FNA<10>*1 9792 IF A4-A3 THEN 9790 9794 26«=Z9*(A4> 9796 RETURN 9808 REM DETERMINE SUCCESS OF POSS. 9810 G1-FNA(20> 9820 IF GI<4 THEN Z2-1 9830 IF Gl<4 THEN RETURN 9840 IF Gl>17 THEN Z2-1

HENRYS COMPUTER KIT DIVISION

404 E D G W A R E RD , L O N D O N W 2 1 ED RETAIL SALES & DEMONSTRATIONS TEL: 01-402 6822

MICROTAN 65 MwnHOI 65 K nmrtut f ip*

YOU M A Y DEDUCT £10 FROM MICRO-T A N 65 KITS

AND ASSEMBLED UNITS LISTED HERE ONLY FROM US

MICROTAN 65 CONTENTS High quality, plated thru hole pun ted circuit board, solder resist end silk screened component identif ication 6502 microprocessor, IK monitor TAIMBUG Not* w i th Y* Bug IK RAM for user programme, slack and display memory VDU alphanumeric display o l 16 rows by 32 characters MlCf iOTAN 6b system file binder 136 page bound, users hardware software manual w i th construct ional detai l* and sample progammes Logic and discrete components to lul ly expand MlCAOTAN 66 The MICROTAN 65 kit has w o n widespread acclaim lor its superb presentation. We pay attent ion to detail1

KIT FORM £ 6 9 0 0 • CIO 35 V A T total C79 36 MICROTAN 65 ASSEMBLED AND TESTED Specif ication as above, but assembled and fully bench tested by ourselves £79.00 • t i l asv AT total C90 85

DELIVERY EX-STOCK POST PAID MAIL ORDERS to: 11/12 Paddington Green, London W2.

TANGERINE* TANGERINE

II W^mTMM ILIL MMMMWMM

• A • GREAT*

EW GAME

JROI

Addictive parties

r l 11)1 I) (.1 Ml

AS MAW SKASO.X.V -I.V YOl UKh. * 4 />/» ISIO\S * V - ^ - r T ^ +PROWjrON* RELEGATION*

I I Lt J £>K w , M * SA i F. Game M (/UT. * MA NA r.fftfA I kA f f f l

* PIC A VOtJLll I V K)K / 1(7/ \f I K II • I. I. (VP* i i n n i l it i i i i i i i •11111)1111 i i 11 i i j

I his is NO I » mere simulation. I his is an rwiliag ami hi* Jilt enjot ahle game in Mhii'h tou plat the purl tif a timlball Manager coping »ith the problems and decisions inniUrd in running tour club. I here arr s» M a ; features il Is impossible lit lis! I hem here hul included are lutm llup learns \ O K M A I M win I. giant-killings. wage hills I» pa), and JIW tan e\ttt he sacked! Il is a game requiring a ureal deal ul skill, and people plat II lor lilerullt hours tin end |»r hate pruul!). W E (a \H \ N | Hfr thai Ihis is one «i I he best computer games ww'te eser plated: Bl I Rl W ARK, this game is extremeU addHlite!

i i i i i i t i t t m n i t i i i i i m m m u T T t i m n n u u u i u i i n i n i i i 111 n i i it 11" " FOOTBALL M A N A<»l K ; M " "

H \KI>W ARE R h Q l l R h D <X t l I'll S fill t MIX! J r.K it ±u

ZX9I/ HK KO\l

L. 16A H I VF

THSM/ I idft) (jtntt LEVEL 11

i M i l

To Orxirr mt < hr,/». Pa f 7 »5 mmdfpayaNr l,i AODK'Tttf 6tW IS m ovr.«. • .<•. r.o. BOX in f ( J W M M H K O U Hit r«\ hi I \*.V MAM 7.M PILASt STATt COWPLH H

THE NEW TEXAS T 1 9 9 / 4 A 4 2 K

PERSONAL COMPUTER

O N L Y £ 2 9 9 . 0 0 * y * T LOOK AT THESE FEATURES • 9900 16 BIT PROCESSOR 3.5 MHZ • 26K ROM INCLUDING I4K BASIC • 7.6K GRAPHICS LANGUAGE INTERPRETER • 4.4K MONITOR • 16K USER RAM (EXPANDABLE T 0 48K) • HIRES GRAPICS 192x256 f • 16 COLOURS WITH FOREGROUND, AND BACK GROUND • FULL MEMORY MAPPED SCREEN • 5 OCTAVES SOUND FROM 110Hz TO OVER 40000 • 3 SIMULTANEOUS TONES + NOISE GENERATOR • BUILT IN LOUDSPEAKER WITH VOLUME CONTROL • PLUGS INTO ANY (B/W GIVES SHADES OF GREY) • INTERFACE TO CONTROL 2 CASSETTE PLAYERS {AUTO COPY AND UPDATE FROM ONE TO THE OTHER) PLUS MANY MORE SUPER FEATURES • 12 MONTH GUARANTEE • OPTIONS INCLUDE:- BIG RANGE OF SOLID STATE PLUG IN SOFTWARE • RS232 INTERFACE • THERMAL PRINTER • DISK DRIVES • SPEECH SYNTHESIZER • JOYSTICKS ETC ETC.

Pleuetendme T I W / 4 A C O M HU I fcKMInc Power supply modu la to rs and t a t t e t i e in ter face! I ' k a t e tend me detai l i and price 1 f o r « hie h I e n d o w a large S A . E Name

Add ies t

Signed

I c iKto te i ' t i cque t o i inc lud ing£44 AS V A T ) P i ca iecha rgcmy Aocet t O i r v m C l u b C u d . Barclaycard Number or telephone your card order dur ing t h o p hours to Watford(OT23)4060I or4405?

Send to The Compute t Centre, W a t f o r d . l i d ISO H t f h Street. W a t f o r d , H e n - W O l i l S

9850 IF 61 >17 THEN RETURN 9860 22=2 9878 RETURN 9900 PRINT "PRESS ANV KEV TO CONTINUE' 9905 GET ZT 9918 IF 2 * = " " THEN 9905 9920 PETURN 99JO FOR U=1 TO 1200 9940 NEXT U 9950 RETURN 9960 REM INPUT NUMBER FROM 1 TO 3 ?964 INPUT "ENTER A NUMBER BETWEEN 1 ATO 3> 'JE» 9966 IF LEN(E*)<>1 THEN 9'*90 •9967 IF «SC(E*><49 THEN 9990 9968 IF 0SC<E*.I>51 THEN 9990 9969 E9="AL' E* ' 9980 PETURN 9990 PRINT "PLEASE RE-ENTER" 9992 GOTO 9964 11062 FOR 1=1 TO 24 11064 F(I)=INT<RND<1>*3)+L 11066 NEXT I 11068 RETURN 11870 FOR 1 = 1 TO 24 11080 READ M * ' I > 11090 NEXT I 11892 RETURN 11094 FOP I M TO 3 11895 FOP J=1 TO 3 11896 READ HK I . J> !READ AL 11097 NEXT J 11098 NEXT I 11100 PETURN 11110 FOR 1=1 TO 20 1I120 PEAD T4*. I ) 11130 NEXT I 11140 RETURN 12100 REM GENERATE TEAM S RATINGS 12110 FOP 1=1 TO 3

Longer l is t ings are best1 That 's the mes-sage you keep d rumming into us on the telephone and by let ter . We l l , they don' t come much longer than Wor ld Cup Man-ager and we hope you take the t rouble to key it in. But tor any Sharp owners who leel it w i l l be too r isky or t ime consum-ing to type it , a cassette of the game is avai lable from Sharpsoft . It costs £5.75 and can be bought f rom Sharpsoft . 86 90 Paul Street. London EC1.

12120 12130 12149 12150 12160 12170 12180 12190 122O0 12210 12220 12230 12240 12250 12260 12270 123O0 12310 12320 12330 12340 12750 12360 12370 12380 12390 I2400 12410 12420 12430 I2440 12450 12460 12470 12480 12490 12500 12510 12520 12530 12550 12560 12570 12580 12590 12600

R(1>=INT<RND<1)*10>+21 NEXT 1 FOR 1=4 TO 11 RFI>=INT-PND<1)*10'+16 NEXT I F O P I»12 TO 1 4

R=20 NEXT I FOR 1=15 TO 17 R=INT(PND<1)*5>+16 NEXT 1 FOR 1 = 18 TO 23' R=INT<RND<1>*5>+l1 NE::T J ft<24)-INT<RND*22-+ll RETURN REM MATRIX OF MIDPIELD POSS. FOR 1=1 TO 3 FOR J=1 TO 3 T4V1,J >=10 NEXT J NEXT 1 T4< 1 . 1 >-5 T4 '3 .3>=15 REM MATRIX OF FREEH CKS TACTICS FOP 1 = 1 TO 3 FOR J-L TO 3 READ T K I J J ) NEXT J NEXT I REM MATRIX OF CORNER TACTICS FOP 1=1 TO 3 FOP J-L TO 3 PEAD T2<: I . J » NEXT J NEXT I REM MATRIX OF ATTACK TACTICS FOP 1=1 TO 3 FOP J-L TO 3 READ T 3 NEXT I

12605 Z9t(1>=" THEIR GOALKEEPER " 12610 PETUPN 12615 REM GENERATE GOALSCORING MESSAGES 12620 FOP 1=1 TO 9 12630 PEAC> A | * . I> 12635 NEXT I 12640 FOP 1=1 TO 9 12650 READ A 2 * ( I > 12660 NEXT I 12670 RETURN 14000 PEM CHECK UAL ID I TV OF NAME [4005 K3=46 14010 F'RINT OH INPUT K»- I > 14020 IF LENU*' I>>>35THEN PRINT "NAME IS TO LONG PLEASE REINPUT" 14030 IF LEN<K»>>35 THEN 14O10 14040 FOR KL-1 TO LEN<K«I>> 14050 K2-ASC(MID* (K* ( I> ,K1 ,1 )> 14060 IF K2 >90 THEN PRINT "ONLV LETTERS ARE ALLOWED-PLEASE RE-ENTER" 14070 IF K2>90 THEN GOTO 14010 14080 IF K 2*32 THEN GOTO 14110 14882 IF K2+K3-90 7THEN FP1NT"WHAT SORT OF NAME IS THAT"? PLEASE RE-ENTER 14883 IF K2+K3-90-3THEN 14010 14085 IF K2=39 THEN 14110 14088 IF K2=45 THEN 14110 14089 IF K2=46 THEN 14110 14090 IF K2V65 THEN PRINT "ONLV LETTERS ARE ALLOUCD PLEASE RE-ENTER" I4100 IF K2<65 THEN GOTO 14010 14110 K3=K2 14115 H€XT KI 14120 PETUPN 15000 IF LEN<J*><=39 THEN PPINT J* 15805 IF LENIJ*><R39 THENPRINT" " 15010 IF LEH- J $ K = 3 9 THEN RETURN 15029 FOR J-39 TO 1 STEP-1 15030 IF ASC'MIO*1 Jt>JPI?I=32 THEN GOTO 16000 15040 NEXT J 15050 PRINT Jt 15060 RETURN 16000 PRINTLEFT*(J*,J> 16010 JF=RIGHT*.JT.LEN<J*)-J> 16020 GOTO 1500O 13000 PRINT " " 18010 PRINT'HALFTIME SCOREI" 18020 PRINT A$<T>TB»" ' S A ^ Z X C 18830 PPINT "DO VOU WISH TO CHANGE VOUR TACTICS"5" 18040 INPUT Zt 13045 IF ASC' L E F T S ' . 1 >,>=89 THEN GOSUB 8670 15050 GOSUB 9640 I8O60 PETUPN

A KING'S ransom in gold could be yours if you are wi l l ing to brave

the terrors of a deep dark cave. But reaching the gold is only half

the battle — there is a particularly nasty Troll guard ing the gold.

He wil l attempt to stop you taking his golden treasure out of the

cavernous labyrinth — that's if he hasn't got to you as you find you

way into his lair. There are 36 rooms within the cave where the

Troll can lurk or where the gold may be found. C an you beat the

Troll in this battle of wits?

RUNS ON AN APPLE IN 3K

5 DIN 6(110)

6 TEXT

7 HOKE

10 REM I TROLLS GOLD I

30 GOSUB 6000

50 6 » OiP - h i ;

60 H0HE

GOSUB 2000

GOTO 1000

REN t DRAM GRID t

GR 1 COLOR3

15; HL1N 4,36 AT

0 FOR I * 6 TO 36 STEP 6i HL1N

0,36 AT li NEXT

COLOR* 5i PLOT 2,2: PLOT 2,3

i PLOT 3,3i PLOT 3,4i PLOT 4

,4l PLOT 4,Si PLOT 5,5

320 C0L0R= 13t HLIN 32,34 AT 35:

PLOT 33,34

410 GOSUB 5000

420 GOSUB 5200

490 RETURN

1000 REH I MASTER ROUTINE t

1010 IF SCRNf 2,2) < > 5 THEN

GOSUB 100

1020 60SUB 2700

1100 GOSUB 5300

1200 GOSUB 3300

1910 GOSUB 2600

1990 GOTO 1000

2000 REH I DOORS t

2010 FOR A - 1 TO 110

2020 A(A) * 0

2030 NEXT

2040 FOR A = 7 TO 36

2050 A(A) * 1

2060 NEXT

2070 FOR A « 52 TO 56

2080 A<A> > 1

2090 AIA •

2100 A(A •

2110 A<A •

2120 AIA •

2130 AIA *

2140 NEXT

6) « 12)

18)

24)

30)

2150

2200

2210

2220

RETURN

REH I Y COORD OF DOOR t

D I OUT, Y I

IF D > 49 THEN 2280

IF D < 13 THEN Y > 6i GOTO

19 THEN Y • 12i 60T0

2270

2280

2290

2300

2310

2320

2330

2390

2400

2410

2420

2430

2440

2450

2440 2470

2480

2490

2500

2510

2520

2530

2540

2550

2555

2560

2565

2570

2575

2560

2590

I 2600

| 2610

s 2620

I 2630

I 2640

y • 30i 60TQ 2390

IF D < 57 THEN 1 « 5i GOTO

2390

IF D < 63 THEN Y - H i 60T0

2390

IF D < 69 THEN Y * 17t 60T0

2390

IF 0 < 75 THEN V « 23» GOTO

2390

IF 0 < SI THEN V * 29t GOTO

2390

V » 35

RETURN

REM I I COORD OF DOOR t IN

. D t OUT. X t

2 « D

IF Z > 49 THEN 2530

Z « I - 6 IF Z > 6 THEN 2430

Z « INT (Z • .2)

IF Z * 1 THEN X

IF Z * 2 THEN X

3 THEN X

4 THEN X

5 THEN I

6 THEN X

2650

2690

2700

2710

2720

2750

2760

2770

2790

2800

2810

4

10 16

22 28

34

IF Z

IF Z

IF Z

IF Z

SOTO 2590

Z « D - 44

Z « Z - 6

IF Z ) 6 THEN 2540

Z « INT (Z • .2)

IF Z « 2 THEN X = 7

IF Z * 3 THEN X " 13

IF Z * 4 THEN X - 19

IF Z = 5 THEN X * 25

IF 2 « 6 THEN X « 31

RETURN

REN t SELECT DOORS t

D » INT U RND (1) t 80)

7)

IF AID) < > 1 THEN 2610

A(D) * 2

SOSUB 2200

SOSUB 2400 3300

RETURN 3310

REH t WHICH DOORS ARE OPEN 3320

? t 3330

FOR B « 90 TO 110 3340

SOSUB 2600 3360

2730 A = D 3370

2740 COLOR' Ot PLOT X,Y 3380

IF D > 40 THEN PLOT X,* - 3390

1 3400

NEXT B 3410

HOKE 3420

RETURN 3430

REH t CLOSE DOORS I 3500

FOR A * 90 TO 110 3510

2820 D * A(A) 3520

2830 A(A) > 0

2840 A(D) « 1 3530

2850 SOSUB 2200 3540

SOSUB 2400 3550

COLOR- 15 3600

IF D > 40 THEN 2880 • 3610

COLOR" 15t HLIN X - 1pX • 1

AT V 3700

SOTO 2890 3710

VLIN Y,Y - 1 AT X 3730

NEXT A 3740

RETURN

REH (LOCATE TROLL t 3800

3010 D « T • 6 3810

3020 SOSUB 2200 3820

3030 SOSUB 2400 3830

3040 X » X • 3 3890

3050 Y « Y - 3 4000

3060 RETURN 4001

REH t RESET TROLL t

COLOR" Ol PLOT X - 3tY

RETURN

REH I SET TROLL I

COLOR" 9j PLOT X - 3fY

RETURN

A

2860

2862

2865

2870

2875

2880

2890

2895

3000

REN t CONTROL TROLL t

SOSUB 3000

SOSUB 3100

C • T - P

IF C < 0 THEN 3370

SOTO 3400

C - ABS ( 0

IF C < 6 THEN 3600

SOTO 3700

REH t HOVE TROLL UP t

IF T < 7 THEN 3500

IF A(T) « 2 THEN T • T - 6

IF T « P THEN 4000

REH I HOVE TROLL OUT I

IF T « 1 THEN 3600

IF A(T + 50) « 2 THEN T * T

- 1 IF T « P THEN 4000

IF A(T) * 2 THEN T » T - 6

60T0 3800

REN t HOVE TROLL IN t

IF A(T O l ) * 2 THEN T *

* li SOTO 3730

REH t HOVE TROLL DONN I

IF T > 30 THEN 3800

IF T « P THEN 4000

IF A(T • 6) * 2 THEN T »

T

T •

6

REH t END TROLL TURN t

IF T « P THEN 4000

GOSUB 3000

GOSUB 3200

RETURN

REH t EATEN BY TROLL t

FOR I * 1 TO 101 PRINT

(7)1 NEXT i GOSUB 3000

CHRI

4002

4003

4005

4010

4030

4040

4050

4060

4070

4080

4090

4100

4110

4120

4125

4500

4510

4520

4530

4540

4550

4560

4570

4580

4590

4600

4610

GOSUB 3200

FOR I * 1 TO lOOOl W I T

TEXT i HOKE i VTAB 10

TEXT t VTAB 10) INVERSE I FLASH

i PRINT 'SOME PEOPLE NEVER L

EARN!!'

NORNAL l PRINT

PRINT 'THE SI6N AT THE ENTR

ANCE TO THE CAVE SAIDi'

INVERSE i PRINT a

t PLEASE

DON'T FEED THE TROLL f t NORHAL

PRINT

PRINT 'THE TROLL JUST ATE V

OU FOR DINNER!*

PRINT

PRINT ' t I t V 0 U L 0

S E ! t t I* PRINT

INPUT 'NOULD YOU LIKE TO TR

Y AGAIN"" | Bt

IF LEFT* (61,1) « 'N' THEN

NORHAL i END

eOTO 50

REH t SAKE HON I

TEXT » HOKE

VTAB 10

PRINT 'I I t t Y O U H

I N t i l t " PRINT

PRINT 1

YOU ARE VERY RICH!! i i t 1 1 • i i i *

PRINT

FOR A * 1 TO 1000) NEXT

PRINT CHRt (7)i PRINT 'BY

THE NAY t i n PRINT

FOR A - 1 TO lOOOl NEXT

PRINT 'CAN YOU LOAN HE A FE

H THOUSAND?*

FOR A « 1 TO 1000) NEXT

PRINT

60T0 4110

REH t PLAYER LOCATION t

5010 D • P • 6

5020 GOSUB 2200

5030 GOSUB 2400

5040 X « X • 3

5050 Y « Y - 3

5090 RETURN

5100 REH I RESET PLAYER t

5110 COLOR* Oi PLOT X - 3,Y

5140 IF 6 ' 1 THEN COLOR- Oi HLIN

X - 5,X - 2 AT Y • 2i HLIN X

- 4,X - 3 AT Y • 1

5190 RETURN

5200 REH t SET PLAYER I

5210 COLOR' 12) PLOT X - 3,Y

5240 IF 6 * 1 THEN COLOR5

13a HLIN

X - 5,X - 3 AT Y • 2i PLOT X

5290 RETURN

5300 REH t CONTROL PHASE t

5305 IF (A(P) < 2) I (A(P • 6) <

2) I (AIP • 50) < 2) t <A(P •

51) < 2) THEN 5490

5310 INPUT *UP, DOWN, RIGHT (OR

IN), LEFT (OR OUT), OR STAY

?*jD»iE - OiEt » LEFT! (Dl,

1)1 IF El » *U* THEN E • -

6

IF El = 'D' THEN E « 6

IF El « 'R' OR El « "I* THEN

E * 1

IF El * V OR El « '0* THEN

E * - 1

5330 J « Oi HOHE

5340 IF (E < 0) AND (P * 1) AND

(8 ' 1) THEN 4500

5350 IF (E * - 6) I (A(P> * 2) THEN

J ' E

5360 IF (E - 6) t (A(P • 6) * 2)

THEN J * E

5370 IF IE « 1) t (A(P • 51) » 2

) THEN J « E

5380 IF (E ' - 1) t (AIP • 50) »

2) THEN J - E

5315

5320

5325

5390 IF J « 0 THEN 5490

5400 GOSUB 5000

5410 GOSUB 5100

5420 P « P • J

5430 IF P « 36 THEN 5500

GOSUB 5000

GOSUB 5200

IF T « P THEN 4000

GOTO 5300

RETURN

REH t TAKE GOLD t

GOSUB 5000

5520 G • 1

5530 GOSUB 5200

GOGUB 5700

GOTO 5300

REH I RESET GOLD I

COLOR' Oi H U N I - 5,1 - 3 AT

Y • 2i HLIN X - 4,X - 3 AT Y

• 1 RETURN

TEXT

PRINT

PRINT CHRt (7)

PRINT 'TROLLSGOLD*

PRINT

PRINT "IF YOU ARE FOOLHARDY

ENOUGH TO-

PRINT 'DESCEND TO THE LOttES

T AND INHOST*

PRINT "REACHES OF A CAVE IN

HABITED*

PRINT 'BY A NASTY TROLL, 3

UST TO'

PRINT 'STEAL HIS GOLD...'

PRINT

INPUT 'PRESS RE TURN'|Al

HOHE

PRINT i PRINT CHRt (7)

VTAB lOi INVERSE i PRINT *t

tt 'fi FLASH i PRINT 'PLEASE

DON'T FEED THE TROLL'm NORHAL

I INVERSE I PRINT ' ttt*

FOR A « 1 TO 20001 NEXT

RETURN

END

5440

5450

5460

5470

5490

5500

5510

5540

5590

5700

5710

5795

6000

6010 6020

6030

6040

6050

6060

6070

6080

6090

6100

6110

6120

6130

6140

MICHAEL ORWIN'S ZX81 CASSETTES CASSETTE ONE for 1kZX81

"I had your Invaders React cassette . . . I was delighted wi th this first cassette." P. Rubython, London NW10

I have been intending to write to you for some days to say how much I enjoy the games on 'Cassette One' which you supplied me with earlier this month Please l e t . . . into the secret of your first t ime load every t ime!" E H.. London SW4

Just two out of over 30 unsolicited testimonials

Cassette One Ik machine code programs: React, Invaders, Phantom Aliens, Maze of Death, Planet lander. Bouncing Letters. Bug Splat. 1k Basic programs: I Ching, Mastermind, Robots. Basic Hangman PLUS Large Screen versions of Invaders and Mare of Death, ready for when you get 16k. Cassette One costs £3.80

CASSETTE TWO Ten games in Basic for 16kZX81

Cassette Two contains Othello, Awari, Laser Bases. Word Mastermind. Rectangles. Crash, Roulette, Pontoon. Penny Shoot and Gun Command. Cassette Two costs £5.

CASSETTE THREE 8 programs for 16k 2X81

STARSHIP TROJAN Repair your Starship before disaster strikes. Hazards include asphyxiation, radiation, escaped biological specimens and plunging into a Supernova

STARTREK This version of the well known Space adventure game features variable Klingon mobility, and graphic photon torpedo tracking.

PRINCESS OF KRAAL An adventure game.

BATTLE Strategy game, for 1 to 4 players.

KALABRIASZ World's silliest card game, ful l of pointless complicated rules.

CUBE Rubik Cube simulator, wi th 'Back step' facility

SECRET MESSAGES If you are spying for the KGB. why not throw away those incriminating code books, and buy this innocent looking cassette? This message coding program is txlp qexi jf

MARTIAN CRICKET A simple but addictive game (totally unlike Earth cricket) in machine code. The speed is variable, and it can run very fast.

Cassette Three costs £5.

Recorded on qual i ty cassettes, sent by first class post, f rom: Michael Orwin, 26 B r o w n l o w Rd., Wil lesden, London NW10 9QL (mail order only please)

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. 1

0 MS=0 : POKE36878.. 0 • P0KE36879, 1 GOSUB5000 2 B=2 :P0KE36879.. 218:GOSUB7880 5 PRINT"3"

172

f M

10 20 30 40 50 55 6 8 70 71 72 73 74 75 76 78 8 0 8 1 82 83 85 9 0 100 110 1 2 0 130 132 135 137 14© 145 15© 160 300 305 310 320 330 340 350 355 360 365 367 368 369 370 380 390 395 397 400 410 420 425 430 440 450 460 470 480 490 1000 1010 1020 1030 1040

PRINT"!"]" :T=7' M=T+3: VV=0 S=0 FORI=1T023 PRINTTfiB<T>" IwJ m " NEXT I X=INT<RND(1)*11) V*INT<RND<1>#23> IFX<3THENT=T-1 IFX>7THENT=T+1 -IFS>3500THEN GOSUB 9000GOTO90 IFS>2500THENGOSUB8000:GOTO90

IS 6 m IS

is M m

o

IFX=5THENPRINTTRB <T >" IFX=10THENPRINTTRB(T >1

IF12<TTHENT=T-1 IF1>TTHENT=T+1 IFX=7 THENPRINTTRB < T >1

VV=7680+ < 22*20) VX=38400+<22*20> IFVCTTHENPOKEW+V, 81:POKEVX+V,5:P0KEW+22+V,93:POKEVX+22+V,2 IFV>T+9THENP0KEVV+V,81•POKEVX+V,5 :POKEVV+V+22,93•P0KEVX+22+V, PRINTTRBCTV IS m " GET fit

IFRt="«"THENM=M-l IFfl$="M"THENM=M+1 IFPEEK < M+7680 >=101THEN300 IFPEEK < M+7680 >=103THEN300 IFPEEK < M+7680) • 102+128THEN300 IFPEEK < 7680+H) =54+128THENS=S+6=FORI = 1T04:P0KE36875,221+1 :NEXTI IFPEEK<7680+M> =51 +128 THENS=S+3:F0RI = 1T04 :P0KE36875,128+1•NEXTI POKEM+7680,42 FORI=1T02:P0KE36874,290+I NEXTI S=S+3 GOTO50 POKE36874.0 FORI=228T0127STEP-1 POKE7680+M,170 POKE7680+M,163 POKE7680+M.205 POKE7680+M,206 POKE7680+M.. 42 P0KE36877,I NEXT POKE36877,0 P0KE36876,127 B=-l :GOSUB7000 P0KE36879 .- 26 PR INT "HI N SPEED BOAT " PR I NT "VOU SCORED " PRINTS;"POINTS" IFS>MS THENVV=0HS=S:GOTO1000 GOTO1060 PR I NT " HHKHWKMSfr'/N TO PLRV R GRIN FORI = 1TO500=GETD*•IFB$="M" ORD$="M"THENNEXTI IFD*="V"THENB=1:P0KE36879,218:GOSUB7090 :PRINT"S"=GOTO10 IFIif="N"THENPRINT"r:«Pl«('I?lPl«i'I««B>»iC:VE.. . BVE. . . " END NEXT I FORV=1TO50 PRINT'Tl PRINT""WT'/N TO PLRV RGRIN NEXTV PR I NT " T T T T T m " GOTO400

REM PRINT" :MS=S PRINT"VOU HRVE GOT THE HIGH" PRINT"SCORE FOR TODRV" PRINT"PLERSE INPUT VOUR NAME"

46 COMPUTER & VIDEO GAMES

S-P-E-E'D-B'O'A'T FINDING the source ol the Macken-zie River by speedboat can be a real challenge in the logging season.

A lot of lumbering is going on and the thoughtless treefellers are send-ing their timber down river with little regard to life and limb.

The Mackenzie River follows the usual watery logic, being slow and sluggish at first but speeding up as you approach its source and after a score of 2,500 has been reached it narrows, becoming faster and more difficult for would-be discoverers to negotiate. Another 1,000 points and it is still more difficult.

A good boatsman will spot the most favourable currents and steer for them. These are shown as bonus points on the river.

The game is simple but it will suit the dexterous and those who can look ahead. It is for one person to steer the boat up-river, trying to miss the logs and hit the bonus scores as they flash upon the screen. To steer the boat use the two cursor keys for left and right.

The program runs as fast as it does because the river is printed onto the screen in a fast working statement and as the boat is poked onto the very top of the screen, each print statement pushes it totally off the screen, so only one poke state-ment is needed.

A graphically exciting and neatly playable game, difficult enough to become addictive.

BY STEVEN H0LLIDAY The variables used are:

MS is high score. T IS tab distance for river. M is the car position. W is the position ready to add to Y to create the trees. S is the players score I is general for next loops X is random number to create the logs' numbers and tab value Y is position of trees VX is colour position from trees. AS is boat movement. DS is Y.'N to play again variable. AE$ is the name of the person with the high score. T$ general get statement variable. V is volume controller. S2 is sound generator.

RUNS ON A VIC-20 IN 3K 50-160 is main body of program. 7000-8000 is music routine. 5000-6000 the instructions. 8000-9000 is the medium width river. 9000- is thin river.

6000-7000 is data for music. 1000-2000 is high score routine. 160-1000 prints score and asks if another go is required. 82&83 makes the trees grow. 120-137 checks next position of craft.


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-

1050 INPUTAEf 1860 PRINTAE*;" HAS THE HIGH SCORE" 1076 PRINT"WITH";MS;"POINTS" 1080 GOTO40O 3825 S=S+3 , . ^ 3095 POKE36875,0 5080 FOR I =38 TO180 :P0KE36881, I : NEXT I - PRINT "73" 5010 PRINT"Sfl SPEED BOAT 5820 p r i n t " m m " 5030 REM SPEED BOAT <V2 BASIC) 5040 REM BV S,L,HOLLIDAY 5850 REM 28/1 /1982 <FORV&CG) 5060 PR I NT " XHHHMRNY KEV TO CONTINUE" 5078 FOR J = 1*0 T038 STEP-1 - F0KE36881,1- NEXT I 5080 tfETTf:IFT*=""THEN508Q, 5090 FOR I =38 TO 180 = P0K£3«fSl', I : NEXT I 5100 PRINT"iD" 5110 PRINT*' THE INSTRUCTIONS" 5120 PRINT" f 513© PR I NT " C 5140 PRINT" CRSR RIGHT=BOAT RIGHT!"]" 5150 PRINT""! CRSR DOWN=BOAT LEFT" 5160 PRINT" NUMBERS=PC» I NTS C EXTRA > TT 5170 PRINT" « G-O-O-D L-U-C-K" s

5171 PR I NT " « BEWARE! ! ! " 5172 PRINT"ALOT OF LUMBERING IS" 5173 PRINT"TAKIING PLACE,SO" 5174 PRINT"WATCH OUT FOR THE LOGS" 5175 PRINT"IF YOU GO TOO FAR THE" 5176 PRINT"RIVER BECOMES A STREAM" 5180 PRINT"MANY KEY TO PLAY" 5185 FOR 1=180 T038 STEP-1 :P0KE36381•I :NEXTI S190 GETT$ :IFT$=""THEN5190 5200 FOR I = 12 TO 100 : POKE36880,1 • NEXT I PR I NT" 73" : 5210 FORI = 100TO12 STEP-1=POK&36880,I :NEXTI-P0KE36879, 6000 DATA225,360 ,225 , 360,225 ,240 6010 D A T A 2 2 8 , 1 2 0 , 2 3 1 , 3 6 0 , 2 3 1 , 2 4 0 6020 D A T A 2 2 8 , 1 2 0 , 2 3 1 , 2 4 0 , 2 3 2 , 1 2 0 6030 D A T A 2 3 5 , 7 2 0 , 2 4 0 - 360,235,360 6040 P R T A 2 3 1 , 3 6 0 , 2 2 5 , 3 6 0 , 2 3 5 , 2 4 0 6050 BATft232,120 ,231,240,228 ,120 6060 DATA225,480 / V - ^ 6070 DATA - 1 . 6080 DATA 195,800,0 ,80 ,195>600,0 ,80 ,195 ,200 ,195 ,SOB,0 6090 D A T A 2 0 3 , 6 0 0 , 2 0 1 , 2 0 0 , 0 , 8 0 , 2 0 1 , 6 0 0 , 1 9 5 , 2 0 0 , 0 , 8 0 6100 D A T A 1 9 5 , 6 0 0 , 0 , 8 0 , 1 9 5 , 2 0 0 , 0 , 8 0 . 1 9 5 , 1 0 0 0 . - 1 7000 S2=36875 7001 IFB>0THENRESTORE

ft o

7010 V=36878 7020 REM 7030 POKEV,15 7040 READP " J l S 7050 IFP=-1THENB=-1 RETURN 7060 READD ^ ^ 7070 P0KES2,F" 7080 FORN-ITOD ;NEXTN 7090 P0KES2,0 7100 F0RN=1TO20:NEXTN 7120 GOT07040 8000 IF14<TTHENT=T-1 3010 IF1>TTHENT=T+1 8020 PRINTTABCTV' IS 8030 RETURN 9000 IF18<TTHENT=T-1 9001 IF1>TTHENT=T+1 9005 PRINTTAB<T>" Id 9010 RETURN

9 "•S=S+6

S-S+12

BAD Baron Megabyte has imprisoned the beautiful Princess Minnie on the top floor of his nine storey castle. She is guarded by his minions who have orders to trample any intruder to death.

Armed with your magic crossbow, you, the brave knight Gothur Lothur Bot find the keys to release her and then guide her to safety for a fairytale ending.~~S£^*^<:

You will find one key hidden on each of the lower nine floors of the castle. On ej 1

floor there are four hiding places. One of these contains a key, two are empty, asfiTtne ^ last one could be empty or contain a sleeping enemy — who will not like being*w6k<^n'_* up

Obstructions to your quest are scattered around the castle, but you can blast your way to safety or kill an enemy with one of your nine magic crossbow bolts.

During your search for the keys an enemy might pop up suddenly when you have j u s t / ^ ^ ^ mounted the stairs to the next floor. And the Bad Baron tends to move the keys aroun3" v ^ C \ \ 111 when you are not looking. H ^ V v ^ -"'j !

You use the keys I, J, L, and M to make your moves and press CTRL and one of J+H^s^r* y ^ ^

keys to fire in a certain direction. — The program was written in Acom Atom, BASIC, and this should help in translating for

other machines. For example, the Atom's screen consists of 16 rows of 32 columns, and the second row starts at 8020, so change lines 15, 121, and 125 to suit your own machine. The program should then run.

The characters used to represent stairs, hiding places and otlier features are defined at the beginning and you can change them easily.

For those with Microsoft-style BASIC, use eg D$ ="D". Line 30 provides an INKEYS FUNCTION, So for other BASlCs change line 100 to 100 K$= IN KEYS . '

After defining variables, line 35 GOSUB's to the end of program text, so you can expand your introduction as much as memory space will allow. Lines 40 and 50 reset variables at the beginning of the g a r r w * ^ ^ ^ ^a^B1

Line 40 starts with a function which ensures a random value for an address within the screen's limits. Line 50 uses a byte array and can be replaced by G$- ' 0123456789".

New floors start at line 60 with a bleep and one second wait, followed by a row of information written to the topjine of the screen. Line 65 FOKL's obstructions are the random locations.

Lines 75 and 80 place the hides on the screen. Line 82 puts a key in one of them and gives a 1 in 4 chance of an enemy steeping in one of the other hides. The array EE allows this extra one.

Line 85 and 87 invert the floor numbers where you have found keys, and also puts your player onto the screen.

Lines 110115 convert the up-down-left-right choice to a screen address increment. Line 130 checks to see if a move would go off the screen. Line 145 reads the "fire" button so the same information Is available to set direction of fire.

Before making a move the program looks at what is already there. If it is a hide a " W " character replaces an " H " character. If it is a key line 195 does a computed GOTO on an integer division on the floor number by nine. The program then branches to line 100 for^ all floors except nine, when it branches to line 3000.

By changing an enemy's character from " H " to "E" for hide characters you will hev£-to step aside to avoid being trampled if you find an enemy. ^

The enemy move is made in lines 300 to 350. To make the lower floors easier on your way up the number of enemy is kept constant — line 310. But the enemy move is only made if the character at the specified address is "E". The routine only moves them up and down the screen but it is possible to make them move sideways.

If the enemy does get you your remains are marked with a cross in line 340.

Program variables: A own position. B bolts. C change of address. D Cown staif character. E enemy character. EE9 enemy address. F floor number. G9 byte array, 0?9 if not got key. H hiding place character. HH3 hiding place address. 1 loop variable. K key pressed number. KKO lable for assembly code. L key character on screen. M Mecharacter (0=dead). N address of speaker. O obstruction character. P Princess rescued. Q quickest time. R random choice, S start of second row of screen. T time taken. U upstair character. V enemy killed. W3 what's in the hide. Y previous best number of kills. 2 last address of screen.

f tun IS I IN AN ATOM IN 3K 4 \ BY 1 GEO IRE il TAYLOR '"9 11

60 62 6 5 7 0 7 2 75 7 6 SO 6 2 8 3 8 5 86 8 7 l O O 1 10 1 2 0 121

D ~ # 8 4 : E = # 2 A : H = # 8 8 : LS S#8P: M=#F ; N - # B 0 0 2 REM DOWNS!A IR .ENEMY.H ID ING,H EY, ME.L /SPEAK ER 0 = # F F l Q « 9 9 9 9 j S = # 8 0 2 0 : U - # 9 5 t Y « O t Z = H 8 1 F F RFM OBSTRUCT ION,SCREEN 2ND L I N E . S C R E E N END

EE 1 1 0 ) . G 9 . H H < 3 ) . K K O . W3 KEVS GOr.ADDRESS OF HIDES.ASSEMBLER LABEL CONTENIS OF HJDES.ASSEMBLER ADDRESS P - l * P . » 2 1 : C ; H O JSR # F E 7 1 : S T V # 8 0 * R T S : J ; P , I N h E v * SUB

T « O : O - O TGOS.50QO; REM INS1RUCTIONS A»S+A . R. •/. < Z-S> : B«9:F=*Or R « 0 ; REM NEW GAME REM ME P O S I T I O N . B O L T S . F L U O R . N O P /CESS F . I « n i O V : I - t -48; N. I s G . 6 2 : N O KEYS YET REM START NEW FLOOR AT 60,NEW MOVE AT 100 P . * 7 ; F . 1 = 1 r 0 6 0 : l - i A I T ; N . I P . t l 2 " K E Y S BOl I S FLOOR " : ? ( S - 9 > =B+48 F . I = i T H 5 * F - H 5 : S ? * A . R . 7 . < Z - S > > = 0 : N . 1 : REM OFSTRUCIONS F . I = 0 T O l O ; E E > « D ; S? < A . R . % (Z-%> > = U ; N . I REM PLACE STA IRS F . I - 0 1 0 3 : H H « S + A . R . y . a - S > : °HH fcH: N . I : REM H IDE F . l « O T 0 3 : W ? I = 3 2 i N*. I : W?<A. R . */.4> - E : W? <A. R. 7.4) »L REM ENEMY. KEY HIDDEN ? A " M ! ? 1 6 - 1 ) . « 4 8 + F : F . I - 0 T 0 9 : S ? < f - 2 7 ) - G ? 1 : N . F REM KEYS GOT ON SCREEN ? ( S - 1 ) °=G'7F ( P . * 7 : REM INVERT FLOOR NO.

LINH K K 0 l K « ? * 8 0 ; R E M SCAN HEYBOARD I F h 4 0 : I F K < 4 6 ? G 0 S . ( 8 0 + h > : G . 1 3 0 0 . 3 0 0 C™ - 3 2 ; R .

COMPUTER & VIDEO GAMES SI

•

1 2 2 123 124 1 2 5 1 3 0 1 4 5 1 4 5 I S O 1 6 0 1 7 0 1 8 0 185 1 9 0 1 9 5 200 210 2 7 0 3 0 0 3 1 0 3 1 2 3 1 5 3 2 0 3 2 5 3 3 0 3 4 0 3 5 0 1OO0 1010 1020 1 0 3 0 1 0 4 0 1 0 5 0 2OO0 2010 2020 3 0 0 0 3 0 1 0 3 0 2 0 3 0 3 0 4 0 0 0 4 0 1 0 4 0 2 0 4 0 3 0 4 0 4 0 5 0 0 0 5 0 1 0 5 0 2 0 5 0 3 0 5 0 4 0 5 0 5 0 5 0 6 0 5 0 7 0

A + C < « Z ; G . 1 4 5 : STAY ON SCREEN

C = - l ; R . C=*0 j R . C = 1 : R . C « 3 2 : R . I F A + C > = S : I F G. 3 0 0 I F ? # B O O l « < 6 4 - O s G . 4 O O 0 » F I R E I F A ? C = 3 2 : G . 2 5 0 : M O V E OK 1 = 0 : I F A?C< > H ; G . 2 0 0 : N O T H I D E I F HH < > A + C : 1 = 1 + 1 : I F I< 4 ; G . 1 7 0 ; R E M ADDRESS? A ? C = W ? I : I F A ? C = E : P . * 7 * 7 : E E < F + I > = A + C ; G . 1 0 0 REM ENEMY H I D I N G I F A?C< > L s G . 2 0 0 ; N O T KEY G ? F - F + i 7 6 j S ? ( F - 2 7 ) < = 6 ? F ; ' M S - l ) = G ' F : G . < 1 0 0 + F / 9 * 2 9 0 0 > I F A ? C = U : F = F + 1 : G . 2 0 0 0 ; L J P ONE FLOOR I F A ? C = D : F « F - 1 : G . 1 0 0 0 : D O W N ONE ? A » 3 2 j A»A«*Cl ?A*=M: REM MOVE ME REM MOVE ENEMY F . I = 0 T 0 1 0 : C = E E ( I ) + 3 2 * < A > E E ( I ) ) - 3 2 * ( A < E E Z | B . 3 3 0 : K E E P ON SCREEN I F A « C : I F ? E E ( I > « E : R . « 3 0 * 7 * " S P L A T - Y O U R E D E A D " * : M = 0 I F 7 C - 3 2 ; I F ^ E E = 3 2 ; EE < 1 ) =C N . I ; ? N = ^ N : 4 : T = f + 1 : R E M MOVE ONE ROW. C L I C K I F M = 0 : ? A = # A B : L I N K # F E 9 4 ; G . 3 5 ; M A R K GRAVE G. l O O

I F F > 0 ; 6 . 6 0 ; D O W N S T A I R P . » 1 2 " Y O U ARE OUT OF THE C A S T L E " ' : P . " W I T H O U T THE P R I N C E S S ! " * " G O BACK P . " I N " T " SECONDS W I I H " V ' K T L L S " P . " B E S T I S " Q " A N D " Y ; I F T < Q f T » Q | Y » V P . " W E L L DONE THOU BRAVE K N I G H T f M ! L I N K IF F < 1 O p G . 6 0 : U P S T A I R P . * J 2 " Y 0 U ARE ON THE R O O F ! " ' " W H O DD YOU T H I N K TOU P . ' " B A T M A N ? " ; F = 9 : G . 6 0 I = 0 ; R F M KEY H I D D E N I F G ? I > 1 2 8 : I F I < 9 : 1 = 1 + 1 : G . 3 0 1 0 I F K 9 : P , $ I 2 * 7 " Y O U MUST COLLECT A L L K E Y S " : G ? 9 = H : G P . $ 1 2 * 7 " 7 HE P R I N C E S S " : P = 1 : G . 6 0 B = B - t : l » 0 : I F B < 0 : G . 1 0 0 : F I R E BOLTS 1 = 1 + 1 : • > N=?N: 4 ; I F A ? = 3 2 : A ? = # 2 E ; G . 4 0 1 0 ; D O T S 1 = 0 ; I F A ? = # 2 E ; A? ( i * C ) » 3 2 : G. 4 0 3 0 ? <S-9> = B + 4 8 : G . 1 0 0 P . 12* * "SAVE THE P R I N C E S S " ' " B Y G . E . T A Y L O R ' " * P . " F O R W A R D = I ' " P . " L E F T - J L = R I G H T ' " P . " B A C K W A R D = M ' " P . " F I R E - C T R L " ' P . * ( D - 3 2 ) % ( — 3 2 ) U " S T A I R S " * < 0 - 3 2 ) " O B S T R U C T I O N S ' " P . <M+32) " YOO " * E " E N E M Y ' " P . " P R E S S R E T U R N " : L I N K # F E 9 4 : R .

I F P ; G . 1 0 3 0 YOU COWARD": F = 0 ; G . 6 0

# F E 9 4 : G . 3 5

A R E ? "

60

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MemotectTs New Memory System for the ZX81 It grows as youprogress

Memopak 16K Memory Extension • £39.95 incLW • s a fact that the ZX81 has revolutionised home computing, and coupled with the new Memopak 16K it gives you a mass«ve 16K of Directly Addressable RAM. which is neither switched nor paged With the addition of the Memopak 16K your ZX81 s enlarged memory capacity will enable it to execute longer and more sophisticated programs and to ncxd an extended database The 16K and 64K Memopaks come m attractive custom-designed and engineered cases which lit snugly on to the back of the ZX81 giving firm wobble-free connections See be>ow 'or ordering information

Coming Soon... • L - - < rji -£v<- . M>k/W».

Vhtu n il l i j i H> 1 « i G r t f t w i C y o w a md Software [>>»**» ItomotKh OQltning Tie*! «S23I IMirtK*

A these products are designed to fit piggy-back fashion on to each other, and use the Sinclair power supply WATCH THIS SPACE for further details We regret we are as yet unabte to accept orders or enquiries concerning these products

Out wen let you know as soon as they become available

MEMOPAK RAM HM4ESCRAPHCS

CEWTWOMCS fFj

How to order your Memopak. By Post: Ft n the coupon below and enclose your

chequeP O. Access or Barclaycard number By Phone: Access Barclaycard holders please ring

Oxford (0865) 722102 (24-hour answering service)

Please make cheques payable to Memotech Limited Please detott my Access, Barclaycard' account number

Memopak 64K Memory Extension -£79.00incl.VAT The 64 K Memopak is a pack which extends the memory of the 2X81 by a further 56K and together with the ZX81 gives a full 64K which is neither switched nor paged and is directly addressable The unit is user transparent and accepts basic commands such as 10 DIM A(9000)

BREAKDOWN OF MEMORY AREAS 0-8K Sinclair ROM 8 16K This section ot memory switches m or out in 4K blocks to leave space for memory mapping holds its contents during cassette toads allows communication between programmes, and can be used to run assembly language routines 16-32K This area can be used for basic programmes and assembly language routines 32-64 K 32K of RAM memory for base variables and large arrays With the Memopak 64K extension the ZX81 is transformed into a powerful computer suitable for business leisure and educational use. at a fraction of the cost of comparable systems

Unique 3 month trade-in offer! When your programming needs have outgrown the capacity provided by 16K RAM and you Imd it necessary to further extend your ZX81 s capacity we will take back your 16K Memopak and allow a dtscount of £ 15 00 against your purchase of our 64 K model * •We reserve the fight to re/ect kx discounting purposes units ich @ have been either opened or damaged <n any way

^ X g j

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&

a

Please send me:

•Pease oet'f wr*cheve-(foes not apply

SIGNATURE DATE.

NAME.

Quantity Price Total 16K RAM, Assembled £39.95 64K RAM. Assembled £79 00

Postage £2.00

Total Enclosed

CV6

We want to be sure you are satisfied with your Memopak - so we offer a 14-day money back Guarantee on all our products. Memotech Limited, 3 Collins Street Oxford OX4 1 XL, England Telephone: Oxford (0865) 722102/3/4/5

Sinclair Computer and Video Games proudly presents two more exciting games tor your Sinclair ZX81. Beat oft an unearthly attack trom the stars in War ot the Worlds and win yourself a small fortune in Bet, a racecourse gambling game. We aim to cater for all kinds of Sinclair user — so we've chosen one IK epic and one 16K special for you to play. So keep your finger on the laser fire button and don't lose your s h i r t , . .

Those nasty Martians are at it again . This time they are swooping from the sky to attack your laser base and smash it into the ground. You can tend them off by firing an invisible laser beam at them.

The laser base is printed at the bottom ol the screen. You can move it left and right using the 'P' and 'A' keys

The Martians appear at random positions on the screen and move down towards you. You must line up your base below them and use the T key to fire then. If they land on top of you the game will end.

If you manage to score 1000 the scoring rate will be doubled and the Martians will mutate into another form.

BY OAVD HEALEY

RUNS IN IK 10 20 3 0 4.0 5 0 5 5 6 0 7 © 9 © 9 0

100 1 1 0 I I S I S O 124 .

= C - R 600

126 X = C -120

© 100

ft 1 3 5 1 4 . 0

R 14 -5 1 5 0 1 7 0 160 1 9 0 4 .0© 4-1© 42© 4 3 0 4.4.0 4-5© 5 0 0 5 1 © 5 2 0 600 610

LETT fl=PI/PI L E T B = F I - P I L E T C - 1 5 L E T £> = 2 5 L E T S = B L E T H = 2 1 L E T E * = " L E T G - R C L S L E T X = I N T < R N D * 2 6 J L E T Y = I N T < R N D * H > P R I N T R T H . C ; " U k " I F Y > H T H E N L E T Y » H P R I N T R T Y , X j E $ I F Y = H R N D X = C OR Y » H A N D X OR Y = H R N D X = C + R T H E N D O T O

I F Y = H R N D X = C + 2 OR Y = H RN£> 2 T H E N G O T O 6 0 0 I F Y = H R N D X < > C T H E N G O T O ©

I F l N K E Y J = " f t " T H E N L E T C = C -

I F C C +

I F C- } 2 6 T H E N L E T C = 2 6 I F I N K E Y $ = " 1 " T H E N G O T O 4 - 0 0 L E T Y = Y + G C L S G O T O 1 1 0 I F C < > X T H E N G O T O 1 7 0 P R I N T R T Y , X - R ; " $$ P A U S E 4-L E T S = S + D I F 5 = 1 0 0 0 T H E N G O T O S O 0 G O T O ©0 L E T E $ = " M V L E T D = D + D G O T O 8 0 C L S P R I N T " S C O R E s " ; S

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F I S II N 1 61 (

'JR STRK'Z T XT O K . P C T 5 Y O U R L OUT i f

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R N D T H E H O R S E Y O U B E I F Y O U L O S E I T S U S T R ? T R K E F R O H Y O U R T O T P Y O U U I N I T H U L T I P L Y S -

YOL'R S T A K E £ Y Y O U R H O R S E , R O D S 1 R L L y H R T T O Y O L I R T O

Y O U MRY Q U I T fiPTER P P R E S S I N G CD R r i E S S || l .miW 111,1 T O 5 T P

R T " i a i n p u t 1 3 REM ( C ) J . G R R N E R 1 9 6 1 T O C + V

6. L E T H = 5 0

2 5 C L S 3 0 L E T 4-C L E T 5 0 L E T 6 0 L E T 7 0 L E T 9 0 P R I N T

R U N N I N G T I N G ?

9 0 I N P U T

R = 3 6=4-C = 3 D = 2 E = 1

" H O R S E S HOU MUCH M O N E Y « £ " ;

N 1 0 0 P R I N T 1 1 0 I N P U T 1 2 0 C L S 1 3 1 P R I N T

, N , , " M O N E Y E " , . H ^ ' T E R D E R t "

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1 2 3 I F B > R R N D B > C R N D 3 > E T H E N P R I N T RT 7 , 3 5 ;

1 2 4 I F C >R R N D O B R N b

2 . 3 , 4 - , 5 R R E RRE Y O U B E T M

H

RT 1 , I S . : " M O N E / L E F T = " , , M - N , . " O N

B E T * " i H O R 6

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D >E T H E N P R I N T R T 7,23, " d " las I F E >R R N D E >£f R N D E > C

E >D T H E N P R I N T R T 7 , 2 3 ; " 5 " 1 3 7 P R I N T RT 0 , 0 , " * * * * * * * * * * H O ~ t

5E R R C E * * * * * * * * * * 1 3 0 P R I N T RT 1 9 , 0 ,

a © , 0 . R , l ; B , 3 ; c , 5 ; D ,

— ~ XF R - l © OR B s . 1 8 OR 0 * 1 8 O P OR E » I S T H E N GOT O 4.0© L E T 2 = I N T ( R N D * 5 > + 1 I F 2 = 1 T H E N L E T R = R + 1 I F 2 = 2 T H E N L E T + 1

14.0 1 5 0 160 1 7 0 1 8 0 1 9 0 1 Q C

DrnlS a00 2 1 0 2 2 0

P R I N T P R I N T P R I N T P R I N T P R I N T P R I N T

RT RT RT RT RT RT

Forget the Grand National and the Derby the ZX

stakes is twice as exciting! You can win a fortune or lose

your shirt — just l ike the real thing.

First you bet on the runners, numbered I to 5. You

have £50 to bet.

When the betting is out ol the way the ZX81 will

d isp lay the race course with the runners at the top of thr

screen at the starting post. The horses are represented

by the inverse graphics characters 1-5.

If you win your stake is mult ip l ied by the number of

the winn ing horse. If you lose the computer will subtract

your stake from your total. Then you have the opportun-

ity of betting aga i n on another.

The variable M sets up the va lue of your money. The

variables A to E set up the positions of the horses at the

start of the race. If you want to be a coward and save

your cash you can finish the game.

3 3 © X r Z = 3 T H E N L E T C * C + 1 24.® I F 2 - 4 . T H E N L E T D » D + 1 2 5 0 I F Z = 5 T H E N L E T E x E + l 2 6 0 G O T O 1 2 2 4.00 S C R O L L 4.01 P R I N T " H O R S E N O , " , Z ; " U O N " 4 0 3 S C R O L L 4.03 I F Z = M T H E N G O T O 6 0 0 4 0 5 S C R O L L 4 1 8 P R I N T ' 4 -20 S C R O L L 4.30 L E T M = M - N 4 -31 I F H < « 0 T H E N P R I N T

rfJ-Sa/jJa* Y f j f < K/)V1 J^LAV^X JB RN^SM n V VJC

/ jiM ' JWA \ -*• U-

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A. 4-35 4-36

3 4-4.0 6 0 0 6 1 © 6 1 5 620 6 2 5

0 6 3 0 7 0 0 7 0 5 7 1 0

Y O U

F M < = 0 T H E N G O T O 2 2 9 0 I F I N K E Y $ = " " T H E N G O T O 4 3 5 I F I N K E Y $ = " Q " T H E N G O T O 25K

G O T O 2 5

L E T N f 1 s M + ' W I f f l F f ^ F ^ I F M>«= 1 0 0 0 0 0 0 T H E N G O T O 7 © I F I N K E Y " T H E N GOTO 6 2 0 I F I N K E Y T H E N GOTO 2 0 ' G O T O 2 5 P R U S E 1 0 0 C L S I F H > = 1 0 0 0 0 0 0 T H E N P R I N T

N O U Hf tUE R M I L L I O N Q U I D

' 2 i 2000 2001 2002 2 0 1 0 2020 2 0 3 0 2 0 4 - 0 £ 0 5 0 2060 2 0 7 0 2 O Q 0 £ 0 9 © £10© 2 1 0 1 £110 2120 2 1 3 0 £ 1 4 . 0 2 1 5 0 £16© 2 1 7 0 £ 1 6 © £ 2 9 © £ 2 9 5 E R T " 2 3 0 ® 2 3 0 5 2 3 1 0

G O T O C L S F O R N = 1 T O M P R I N T RT 2 1 , 2 5 S C R O L L P R I N T " « in. . . . S C R O L L P R I N T " I S C R O L L P R I N T " I or S C R O L L P R I N T " f i S C R O L L P R I N T S C R O L L P R I N T S C R O L L P R I N T S C R O L L P R I N T S C R O L L P R I N T NE XT N S C R O L L P R I N T

* i • t £ " ; N

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Breakout. Wntten in M/C for good graphics. Try to knock all the bricks from the wall. Listing IK £3.95. Dragon Maze. Find your way through the maze—but watch for the dragon he sometimes breaks the rules in anger. Listing 16K £4.95. Startrek. As Captain of the ENTERPRISE you must rid the Galaxy of alien Klingons! 16K £4.95. Life. Written in M/C giving 24 x 32 screen dimension, automatic or self step operation plus special MOVE' feature. 16K £3.95. Fruit Machine/Pontoon. Two programs for the impulsive gambler, auto-run & hold features, good graphic display. 16K £2.95. 3D '0 & X's/Connect Four. Both programs written in M/C with choice of level of play. 16K £5.95.

16K RAM Pack

assembled, tested and cased £37.50 inc (P&P) Allow 21 davs delivery

All supplied on cassette/Listing send cheque, P.O. or Card no. with order

i 26 Spiers Close. Knowle. Solihull West Midlands. B93 9 ES, England

I N S M I I H

• • • • • • • • • • • • * • • • • • • • • • • • • • • • • • • • • * • • * •

DISK c

19.50

16.00

30.00

CAS. c

16.00

12.S0

26.00

BULLOCK COMPUTERS MAIL ORDER ONLY

Introducing the most amazing graphics Software yet for the TRS-80, extensive use of sound, real-time, etc. etc A R C A D E : E L I M I N A T O R - You're the pilot of the Eliminate a space fighter armed to the teeth w i th awesome firepower 8ut you're outnumbered and your attackers are keen (super sharp graphics and sound) D E F E N S E C O M M A N D The Galaxy Invaders have returned in this newest game of skill and excitement w i th a new twist (absolutely incredible votce effects, w i th high quality graphics) V A L K Y R I E Leo Christopherson at his best O r e of the finest graphics-based adventures available F O R B I D D E N P L A N E T The first |.« K ng adv tu f r three different voices, the best yet All votce output through cassette port - no special equipment required' Otsk only 30.00 A R M O U R P A T R O L - Real time battle action excellent use of graphics Requires great skill 19.50 16.00 JOYSTICKS N o w you can .'del rast ,*aion to a' your w i th on- -p<,t joystick. The adaption for the TRS-80 includes a list of patches, tfils allows you to use your joystick w i th many of the popular Arc ade games 2 3.00

The fo l lowing programs are available to order Scarfman, Starfighter. Missile C o m m a n d , Shy Warrior. Macro-Monitor. P o w e r D r a w (graphics). Speak (mod 3 only), Super Utility, Super Utility Plus. Laxywrl ter . Mitroproof. Baslc-S, Batlc-S/CMD.

Announcing E D A S 3 .5— E D A S is ,t sophisticated Editor .ind Assctibler for I he TRS-80 • all text may be input in upper or lower case • assemble directly from one or more disk files via'GET • assemble t o disk or memory • binary, octal, decimal, hex and stnng constants, multiple constants may

be input on a single line • CMD FILE util ity included • conditional assembly support • cross-reference utility • DOS functions DIR. FREE. KILL and UST • 14-character labels inc special chars '$*. ' .* . "7* • Editor includes block move, global change renumber f ind • EDTASM & M-80 source files can be read or wr i t ten

The features above are only half of what this package can do, in our opinion it's the best! Wefeet we must mention that EDAS is the only commercially available Editor for the TRS-80 Model 3 E D A S M O D E L 1 O R M O D E L 3 €60.00 All prices are inclusive Of VAT • 15% Please add E1 SO postage and packaging All programmes available for Model (/111 Please state model and whether disk or cassette when ordering

BULLOCK COMPUTERS 4a Vicarage Road. Edgbaston. Birmingham Tel: 0 8 8 9 4 3 0 5 S

Complete Sinclair ZX81 BASIC Course Ai lost a comprehensive text for your Sinclair 2X8f The complete BASIC Course a manual wNch will immediately become an irxjrspensibie work of reference for ail your 2X81 programming

Whether you have nevet done any programming ot whether you are an experienced microcomputer user 'he Complete BASIC Course w* provide an mvaiuaoie OK)

Not Only JO Programs for the Sinclair ZX81: IK — Not only over 30 programs, fiom arcade games to if*.* trial challenging Draughts piayirg program which OB fit mto the unexpended IK Smcioit ZXfll Put also noles an how fhese programs were written ond special tips' Great value Machine Language Programming Made Simple for the Sinclair — A complete oegmnet s gu»ae to the compuior s own language - ZOO machine tonguage Mochme language programs eno&e you to save on memory ana lyptcalv give vou programs tnai run O 30 irrves foster tfion BASIC programs

ZX81 ROM Disassembly Part A I his Dook is tor the programmer that needs compieie answers aoout the ZX81 Dr logon has examined on routines m the f?OM and here he comments on each one it covers an ROM ocatons from OOOOH TO OF54H ond incudes an functions except tor the routines used m the (looting point COfcUator Understanding Your ZX81 ROM A tuiiion! gode tor more experienced programmers ov DF lan Logan INS Doc* illustrates the Smcio* s own operating system ana how you can use it

l i t e E s s e n t i a l S o f t w a r e C o m p a n y

We are pleased to announce the opening of our new shop at the TECHNICAL LEISURE CENTRE,

1, GRANGEWAY, KILBURN, LONDON, NW6.

GRAND OPENING -29th 30th &

31st MAY.

Come and

exciting range for

ZX81, TRS80 VIDEO GENIE

* X 8 1 J

OUR GREAT NEW

CATALOGUE

IS NOW AVAILABLE

SEND S.A.E.

Order Form: mrm

Older* to Thr Essential Software Company. Dept 8T (Visconti Ltd.) Ot BC« 0449 47 Brunswick Centre, London WC1N 1AF NAME:

ADDRESS:

Postcode

I The Compieie Sinclair ZX 81 BASIC Course £17 5 0 • Basic Course Piograms on Cassette £ 2 SOO Sinclair ZX 81 ROM Disassembly Pari A - OQOOH-OF54H £ 7 00 D Not Only 30 Programs Sinclair

- ZX 61 IK £ 696 O Machine Language

• Progiamming Made Simple £ 6 95 Q Understanding Vour ZX 81 ROM £ 8 95 •

' Postage and Packing £ 0 70 . Remittance enclosed

^ r\

10 20 30 40 50 fed 70 ao 100 u o 120 130 140 150 160 170 ISO 190 200 210 220 230 240 230 260 270 260 290 300 310 320 330 340 350 360 370 380 390 400 410 420 430 440 450 460 470 480 490 500 510

RE* LET LET LET LET LET LET PR INT"3

PRINT"

HELICOPTER LANDER 3=0 R - I NT(RND(1 )»20)+10 H= 14 A * = " " B * - " " HD«1

90 LETS s S+ l : LEFT*< B*> H D - 1 ) ; LEFT** A * , H) f * 2 1

P R I N T " " I LEFT*(B*» HD); LEFT* t A * . n > i " > 2 8 8 8 " P R I N T " " ! L E F T * +1 DN Z GGSUB24C >260 IF PEEK<151)"42 ANDH>2 - THEN H=H-1 IF PEEK(151)=41 ANDHC36THEN H - H + l IF PEEK(151)=18 THEN HD=HD+1 IF H D O I O THEN 80 IF H-R 0RR=H-1 ORR-H-2 OR R=H-3 THEN 260 G0SUB320 GOTO 380 ENL " IF R> 3 THEN R=R-1 RETURN IF R <38 THEN R - R + l RETURN GO SUB 320 PRI-\tT"*SuCESS»" PRINT"Sl"MINUTES GGTG 450 PRINT"3" PR I .MT " " ! LEFT* ( B * . HD- 1) J LEFT* < A * , H) ( " x 2 * " PR I N T " " * LEFT* (B* ,HD)» LEFT* (A* > H ) t " ) 2 8 8 8 " P R I N T " " t L E F T * ( B * . 1 1 ) ; L E F T * < A * . R ) f " 8 8 8 8 " GOSUB 500 RETURN REM FOR N*1 TO 5 iLET HD»l l*NtGOSUB 320«NEXT N PRINT"CRASHED" PRINT""» LEFT* < B * . H D - 1 ) I LEFT* < A*» H ) t " PR INT" " l LEFT*<B*»HBJ I LEFT*<A* , H ) t " PRINT" "»LEFT*<B«»16) I L E F T * ( A S » H ) i " # 1 « * 1 # " POKE 1 5 8 , 0 PRINT" AGAIN ? " GETA*: IF A* = ""THEN 460 IF A * » " Y " THEN RUN IF A*a "N" THEN END GOTO 460 PRINT""» LEFT*(B*» 1 2 ) " nmnmnmnmnmnmnmnmnmnmnmnmnmnmnmnrnnmnfnnfnn RETURN

RUNS ON A PET IN 8K

BY BARRY COOPER Flying your helicopter over a

rough North Sea you have to set

down safely on an oil rig's pitch-

ing a nd roll ing l and ing pad —

and not crash into the sea.

You use the 4 key to move left,

6 to move right, 8 to go up and 2

to go down . The characters

inside the string quotes in lines

100, 110, 120, 330. 340, 350, 430

and 500 should be typed in shift

mode to produce the graphics

used in this game.

The variables are: H and HD —

height and position of helicop-

ter. S — score. R — random posi-

tion of launch ing pad.

AND ANDREW GREEN

READY.

I MM

RUNS ON A TRS-80

BY LANCE MICKLUS

150 €LEflR2OO:ftAN00H:&EFHHTA-Z

200 60SUB30300

450 Ll>2:SL=64:BI.*4:GF=50:RV=16396

600 GOTO10300

2125 IFTC<250RRND(6FK>1TH£N2425

2150 IFTCS

300LET6F=20

2175 IFLC<30RL090RLC»260RLC=360RL{>37THEN2425

2200 IFLC>2tflN0LC<31THEN2425

2225 PRlNT'Holy stokes. An tried guard just sliced in.'

2250 60SUB20350:IFV8< >120RNQ< >15THEN5575

2275 I-13:60SUB21450:IF*<>-lTHEM5575

2300 IFBL=OCLS:PRINT*ri out of atiunition.,

:PRIMT:60T05600

2325 PRINT'ziZAP' No iore guard.*

2350 BL=0t-liIFBL=0PR1MT*Iout of a««unition.*

2425 IFK0OTCTHEN2550

2450 1=22:G0SUB21450:IFY< HTHEN2550

2475 PR INT*Your McDonald's Haiburger is cold.'

2550 60SUB20350iTC=TC+1

2575 IFVB=OANDNOs

OTHEN2650ELSE28OO

2650 PRINT*! don't know how to do that.':E0T02125

2725 PRIMT'Nothing happened.*:60T02125

2800 IFVB>10RN0>7THEK3I75

2825 IFNOa

0THEN2650

2850 IFDS(LCfNO-l)=OPRINT*I can't go that way":B0T02125

2875 IFDRANDDS(LC, MO-I)>2ftNDD5 <LC, W H ) <6PRINT* 1 can't go that w

ay. Flight deck doors are open.

NO AIR!!!':60T02125

2900 1 FNO*3ANDLI>31ANDNOTDJ PRINT HOI: 6CT02125

2925 IFlC»55ANODS(LC,NO-ll=36ANDOBI2l,OK)OPRINT'The robot won't

let »e through.*:G0T02125

2950 IFLC=17AND0B(13,1)"17THEN5575

2975 IFLC=9AND0B(5,H*9TH£N5575

3000 IFLC'90RLC=17LETK£»(tC)="

3025 LC=DS(LC,N0-1)

3050 IFLC*34LETHEt CLC)

3075 IF1026THENII800

3100 60T010300

3175 IFVB=3$OTQ10300

3250 IFVB02THEN3700

3275 IFNO=OPRINT*I don't know what a *iCHRH34);NO«IO)iCHR»(34l;

' is.':60T02125

3300 IFCR>5PR1NT*I can't carry any tore.

HINT: Drop southing. *:60T02125

3325 FORIMT0L0: IF0B (1,0)=NOITHEN3350EISENEITI:60T02650

3350 IF0B(I,1)«-IPRINT*I'« already carryinq it.•:60T02I25

3375 I FOB CI11>< >LCPflIMT"I don't see it.':60T02125

3400 IFN0O37THEN3475

3425 K*13:60SUB21450:IFYO-IPRINT'I don't have a blaster to put

it in.a

:60T02125

3450 BLS

4:0B<1,1)*0:PRINT*Hy BLASTER'S reloaded.*:F0RI«1T01:NEIT I:60T02125

3475 IFMQ*150RN0=250RN0=34PRINT*He looks pretty aean to M.*:60T

02125

3500 CR»CR+l:0B(Itl)»-l:PRINT*0.K.*:F0RI=lT01:NEITI

The evil General Doom is holding Princess Leya. the leader of the Forces of Freedom, captive on his ship. He captured her ship — bound for a secret command centre on the planet Harris Seven. He has also captured her entire treasury of Melidium Crystals, the currency ol the galaxy.

Princess Leya is wearing a Shinestone necklace, Encoded in one of the stones is the location and strength of her Freedom Fighting Force.

Through the medium of your computer you can roam the ship and attempt to rescue the Princess. Even if you do not manage the rescue you must try to disrupt Doom's plans for the galaxy. There are guards all over the ship and you could be easily caught and imprisoned.

The computer understands several ordinary English commands such as GETT and DROP. Othei words that you can use are HELP, INVEN, LOOK, and SCORE. There are more — but you must discover these yourself.

3525 IFN0= 14ANDN0TCRPRINT*A voice says: •;CHRH34);*SESA!1E*;CHRI

I34>;V:CN=-1

3550 IFN0s

22ANDND=0LETND=TC+

50

3575 IFWM2LETHE4I2)®*'

3600 IFN0I

l3LETH£l(7)a

'*

3625 60T02125

3700 IFVB04THEN3B75

3725 PRINT'I't carrying:'

3750 K=0:F0R IT0L0:1 FOB 11,1 >1PRINT0B* III i K M

3775 NEHl: IFK«0PRINT*N0THIN6*

3800 PRINT:60T02125

3875 1FVB< >5TKEN3950ELSE605UB21050:60T02125

J950 IFVB06THEN4200

3975 IFN0=0THENJ275

4000 lFLC=2PRINT"There's no rooi here.*:60T02125

4025 IC=0:FORI=1TOLO:IFOB(I,1)=LCLETI(MC*1

4050 NEITI:IFIC>12PRINT"There not enough root. Get rid of south

ing.*:60T02125

4075 FORI'OTOLO: I FOB (1,0) =»*01T KEH41OOEL SE ME * T1:60T02630

4100 IFOBd,lKMPRINTM'e not carrying it.*:60T02125

4125 CR<R-l:0B(Itn»LC:PRINT*0.K.*:F0RI»IT01:NElTI:80TQ2125

4200 IFVB07THEN4300

4225 IFKEI(lC)'"TK£NPRlNT'How at I supposed to know what to do1

* a

:60T02125ELSEPRINTHEt(LC):60TQ2125

4300 IFVB08THEN4750

4375 IFN0TBTTHEN4475€LSEPRINT*Press (ENTER) when ready to : RECQ

RD

4400 60SUB22000:G0T04525

4475 IFN0l(0)«"PRINT*Try soiething like *;CHRII34);VB»(0>j* fil

espec';CHRI(34);'.a

:60T02l25

4500 0PEN'0\l,NO»<0)

4525 F0RI=0T0L0

4550 IFBTTH£NPRINT|-1,0B(I,0),0BtI,1),D8(I,2)EIS£PRINTI1,08(I,0)

;OB(I,1);OB(I,2)

4575 NEITI

4600 IFBTPRINTt-lJB.TC.CNsPRINTI-l.WjL.flO^INTI-l.eF.DJ.CRjP

RINTI-l.LC

4625 IFN0TBTPR1NTII JB;TC;C11fOR;Bl;W;6F;DJ;CR;LC

4650 IFNOTBTCLOSE

4675 PRINT'O.K.':60T02125

4750 IFVB09THEN5150

4825 IFN0TBTTHEN4925ELSEPRINT"Press (ENTER) when ready to I READ

TAPE r

4850 60SUB22000:60T04975

4925 IFN0t<0)s

**THEN4475

4950 OfENM\i,MOHO>

4975 FORI=OTOLO

5000 IFBTTHENINPUTI-l,0BII,O),0B<I(n,0B(I

t2>ELS£INPUTIl,OBfI,0)

,08(1,1),0B(1,2)

5025 NEITI

5050 IFBTINPUTI-1,TB,TC,C(1: INPUT!-1,OR,BL,ND: INPl)Tt-l,6F,DJ,CR:I

NPUTI-l.LC

5075 IFMKBTIMPUTIl,TB,TC,Cfl,Dfl,6!.tHD

)6F,DJ,CR,LC

5100 IFN0TBTCL0SE

5125 HTOI0300

5150 1FVB< M0TKEN5225ELSECLS: J=0:60T011200

5225 IFVBOHTHEH5725

5250 IFNQOI0TKEN2650

5275 !FLC<>?ANDlC<)llPRINT'tlhat button,,

:60T02125

5300 IFLC-11ANDM0T TBLETTB=-1:PRIMTK2f:60TD2125

5325 IFLC=11ANDTBLETTB=0:PRIMTKJ*:60T02125

5375 I=12:60SUB21450:IFV<>1THE«2725

5(25 1=24:6QSUB21450:IFY01THEN2725

5450 [FIWTTBPRJNTN!I:60T02725

5475 IFN0TDRPRINTN4»:60T02725

5500 60T0U150

5575 CLS:PRINT'H E L P 1

• '*:PR1NT

5600 PRINT'Roche Soldiers art everywhere. I've been captured.'

5625 PRJNT'I'a no* a prisoner. Moe is ae...*

5650 60TO 11500

5725 IFVBOl20RN0=0THEN6025

5750 IFBL-OPRINT'But 1 don't have any aaaunition left.*:60TQ2125

5775 ls

13:6QSUB21450:IFYO-IPRINT'But F » not carrying a BLASTER

.*:6QT02!25

5900 i=N0:60SUB21*50:IFY=-|PRIMT"1 can't. !'• holding it.':60T02

125

5825 IFN0=J4PRINT*ziZAP":BL=BL-l;60T02125

5B50 IFYOLCPRIMTM don't see it.*:60T02125

5875 FORIMT0L0: IF0B11,0) =NQ*THEN5900ELSENEITI:60T02650

5900 0B11,II«0:FOP 1=1 T0I:MEITI:PRIMT"33ZAP*!• The ';NQHIt0>{* v

aporiicd.'

5925 Bi.=BL-l:IFBL=0PRINT*r« out of aMunition.'

5950 60T02125

6025 JFVB013THEN6275

6050 IFN0i

0PRINT*Say «hat?':60T02125

6075 1=14:6 OSUB 21450 6100 IFY<)-IORNO<>19PRlNT'O.K. "; NO*(NO):60T02125

6125 1FDR60T02725

6150 DR=-1:PRINT*A voice coaes over the P.A. systea and says:

0PENNIN6 FLIGHT DECK DOORS* 6175 IFLC)2ANDLC<6PRINT'

tips!!! There's no air!!' CROAK...*:END

6200 60T02125 6275 IFVB014THEN6750

6100 IFN0< >20AMDM0<)I6ANDN0< > 11ANDN0< >33THEH2650

6325 IFN0*20THEN6550

6350 IFN0<>I6THEN6450

6375 ]FQB<6,l)«-lPRINT*Sorry. I'« not a cartographer.':B0T02125

6400 IFOBU.lKCPRlNT'Try BET HAP.':G0T02125

6425 PRIMT'It's not here.*:60T02125

6450 I=N0:G0SUB21450:IFY< >LCANDY< >-1THEN6425

6475 IFNO'l IPItlNT'It says: » NEEDS TURBO « '

6500 IFM0=33PRIWTMt says: » OUT OF ORDER « *

6525 60T02125

6550 IFLC013PRINT*! don't see any.':60T02125

6575 PRINT:PRINT*It says on the nail,'

6600 PRINT')) YOUR MOTHER'S SOT A BIG NOSE « '

6625 PRINT')) KILR0Y MADE IT HERE, TOO « *

6650 PRINT*)) SAY SECURITY « *

6675 60T02125

6750 IFVB015THEN6975

6775 IFN0=0PRINT*Nhat's a '{NO«<01;">':6QT02125

6800 IFN0022PRINT*Don't be rediculou5.':60T02125

6825 1=22:6QSUB21450:IFYO-lPRINT'I'a not holding it.*:60T02125

6850 FORI=lT0L0:IF0B(I,O)=22THEN6875ElSENEni:PRlNT*I don't fcnoi

•here it is.*:60T02125

6875 08(I,l)>0:PRlNT'Chuap - Chuap. Huaaa, good.*

6900 FOR I=1 TO 1:NEXT I:B0TQ2125

6975 IFVB0160RN00230RLC016THEN7125

7000 1-23:60SUB21450: [FY< >- IPRINTfll 60T02125

7025 0BU1,113

0:0BI 14,l)sl6:CRs

CR-l:PRINTN2l

7050 G0TQ2125

7125 IFV80I80RN0036THEN7275

7150 IFN00360RLC031THEN2650

7175 X=17:60SUB21450:IFY<)-1PRINTH3I:GOT02125

7200 HEK31I*":DJ=-1:PRINTH4»:60T02125

7275 lFVBOI9QftNQ=0THEN7600

7300 IFN0O34PRINT'That's stupid ":60T02125

7325 IFLC<)35PRINTN5I:GOT02125

7350 1=22:60SUB21450:IFY<)-lPRlNTH6l:60T02125

7375 IFW)05PRINTn7»:60T02125

7400 IFN0OJ4PRlNTN0M0);f18»:60T02125

7425 IFTC)NDPRINTB9»:60T02125

7450 FORI *I TOLD:1FOB <1,0)>34 THEN7475ELSENEIT I:B0T02650

7475 K*I:FORI»1TOLO:IFOB(1,0)=22THEN7500ELSENE*T1:60T02650

7500 PRIMTNO*:HEt(35)=* *

7525 OB<K, 1) =0:OBi1,1) =0: OB<21,OMO:OB$<21)»a,"s FOR I = 1 TO!:ME X TI:BO T 02125


7625 PRJNTNOi(0):60T02125


7725 IFN0=0THEN2650

7750 *=MO:60SUB21450:IFY=-tPRIKT"1*» carrying it. That's lapossi

ble.':60T02l25

7775 IFY=LCTHEN7850

7800 IF NQ<110«N0=190RN0=200RH0=30THEN2650

7825 PRINT"! can't hit soaettung I can't see.*:60T02125

7850 lFNO=15O(tN0=250RNC=34PRINT'I'd rather not. He aight hit ae

back":60T02125

7675 IFN0=35PRlNT*That's not nice!':60T02l25

7900 60T02725

7975 IFVB< >21THCN8000ELSE PR I*T-1 *• not strong enough to k i l l any thing.•t6Q?02125 B000 B0T02650 10300 CLS:PRINTDS»(LC)iAI="

10305 IFLCS

35LET6F=10

10400 IFLC-7THENI0700

10450 KS

0:F0RI=1T0L0:1 FOB (I, UOLCTHENIO6OO 10500 IFK*0LETK»t:PRINT:PRINT*Around ae I tee:':fl»=0B*<I):B0T010

600

10550 IFLENIA«)*5+LEN(0Bf(II)>SLTHE»PRINTAI:LETA«=0Bt(11 ELSEAt-A

I f *+OBt(l)

10600 NEXT1 10650 IFA«0"PRINTA»

10700 PRINT:PRINT'Obvious directions are *;:K=0

10750 FQRI=0TO5:IFDSILC,I)a

0THEN10900

10800 IFKOOPRINT',

10850 PRINWJ«Utllj:K*l

10900 MEITI

10950 IFK»0PRINT'unknmn€

!

11000 PR!NT\':60T02125

11150 CL5:60SUB21050

11200 IFJ=OPRINT'Ne have FAILED our aission.

The forces of Princess Leya Mill be conquered." 11250 IFJ=SCPRlNT'Ne are HERDS.

The forces of Princess Ley* wi 11 conquer the evil Roche

soldiers, and freedoa Hill prevail throughout the galaiy.*

11300 IFJ>OANDJ<SCPRINT*Me have helped the forces of Princess Le

yi defend the

galaxy. Long live the forces of freedom!"

11500 PR1HT 11550 INPUT'Do you want to play again (V or N)*!At:AI=LEFTf (At,1

)

38660 LV=21 DIHVBKLV) 38650 VB$(1)»"G0' VB$(2)=•GET^VB$G)="L0a• 30700 VB«<4>*'INVBr VW<5>='SO)RE' m<6)="DR0P' 30750 VBt(7)*'t£LP* VW(8)='SflVf" VB*<9)='L0At>* VB«<i0>**OUIT" 38880 YBKll^'PRESS' VB$(12>="SHOOT' «K13)» 'Sf lV 38850 VBS<14)="READ' W(15)='EAT* *BI<16>='CSAVf 38908 VB*<17)='SH0W' V«(18)='0PEN' VW<19>*'FEED* 30958 VB$(20)="HIT" VW(2D='KILL" 31180 L»=37:DIfK»<LN> 31150 M0S<1)='NORTH* NO$<2)=*EAST* NW<3)»*S0UTH* 31200 NW<4)='l£ST* NW(5>='UP* tt»(6)*'KM<m

31250 NOI(10>=*BUTTON* NOi<il)s"TAG" N0$(12>='FIJEL' 31300 HC»(13)s•BLft5TER^M0«(14)=•C^mKICftT«, NW<15)=*GUARD' 31358 N0f(i6>=*W>* N0$(17)=*KEYS* N0«<i8)=**CKLACE* 31480 NO$(19)=*5ESf*€* N0$(28)=*QRflFFlTr 31458 NW<2i)='CAPE* N0H22>«'t#WUiGER* 31588 NQ$(23)=*TAPE* NQ$(24)=,TUR80' 31550 NCH<25)=*SCIENTIST* :N0$(26)='PLflNS' 31600 NM<27)=,SOOflTIC* N«C28>*'DEVICE* NW<29)«'OJN* 31650 MW(30)=,SECIR1TV N0*G1)='I 0 * M0l<32>x*CRYSTALS' 31700 N0$G3>=*SIGN* K»<34)='R080T' N«<35)='PRINCESS' 31750 NW<36)='DOOR* NO$<37)=*Af«JNITION* 31900 a»37 Drn>s»<a> 31950 DS$<1>»"IH IN T*C PASSENGER I STORAGE COHWTfCHT OF IN S PACE SHIP THERE'S AN EXIT HERE TO LEAVE TH: SHIP • 32000 DATA2, 8, 8,6.6.3 32858 0SI(2)*"I 'H IN TIC COCKPIT OF M SPACE SHIP A LARGE RED BUTTON SAYS » PRESS TO BLAST OFF « ' 32100 DATH8,0, L 8/ 8,0 32150 E>S»(2)s-|'« STANDING «XT TO Iff SPACE SHIP WICH IS LOCATE 0 ON A HUGE FLIGHT DECK *

11600 IFA1='Y'THEN!50ELSE£ND

11800 CLS:PRINT*A voice booas out, ,

iCHR*(341;

,

«H0 GOES THERE";C

HRM34I

11850 6DSUB20350

11900 IFVB013QRN0030THEM575

11950 PRINTN1*

12000 60SUB20J50

12050 I*3I:60SUB21450tIFY<>-lTHEN5575

12100 1FVK > 170RN0< >31THEN5575EL5E10300

20350 IFBTTHENINPUT'Nhat should I do*;CMELSELINEINPUT*Nhat thou

Id I do? *;CI1» 20395 VB*(0)* ":NQ«(0)«*':VB"O:N0=0: IFLEN (CM) =0RETURN

20400 FORZLe

lTOLEN(CIU):IFHID*(CH$,IL,DO* *THENVBt(0)»VB*(0)+H

IBICCM(ZL, 1) iMTXTZL

20500 F0RZLOT0LV:IFVBt<ZL)<>**ANDL£FT«(VBI(0>,LEN<VB<<ZL) tIL)THEHVB=ZL:60T020600ELSENEITZL

20550 VB«0:MOI(0> =VB*(0)160T020650

20600 IFLEN(VBKO))+1 >*LEH(CM)THENN0>0:RETURNELSENOI(0)*RI6HT»I

CHI,LEN(CH«)-1-LEN<VB»(0>>)

20650 F0RZL3

1T0LN: IFNOI(ZL)< >' •ANDLEFT*(NG» (0), LE*(NO! (ZL1)) *N0t

(ZL)THENW)=ZL:60TQ20BOOELSENEITZL

20700 NONRETURN

20800 F0RZL«1T01:NEITZL:RETURN

21050 J=0:F0RI«1TOLO:IFOB(1,1)»1LETJ=J+OB(1,2)

21100 NElTI:PRIHTa

Out of a aaiieue ofjSC;'points, you have'iJ;1

points.'

21150 IFJ=OPRINT"Ne're not doing too good.'

21200 RETURN

21450 FQRZL=OTOLO:IFOB{ZL(OWTHENY=OBIZL,1):60T021500ELSENEITZL

:Y*-99:RETURN

21500 F0RZL=lT01:NEnZLiRETURN

22000 At=lNKEY$

22010 IFINKEYI**'THEN22010ELSERETURN

30300 SC=215

38458 IFPEBU16396)*201T)O®T«-1£L5EBT«0

32268 DATRL8,0,4,0, L 0 32258 K K O ' T H OUT ON T)C FLIGHT DECK OF GEJCRAL DOOM'S BflTTL E CRUISER1

32388 DATA3,5.4,4,8,8 32358 DS»<5)«CS»(4) DAT A4,6.5-4,8.8 32480 DSI<6)='I'N IN 8 HALLWAY T1CFE ARE DOORS ON f U SIDES T * DOOR TO T)€ NORTH SAYS: » CLOSED FOR T>C DAY « • 32458 DATA7,fc&5,0.0 32580 DS«(7)»'rH IN T>€ SUPPLY DEPOT AROLN) rC I SEE ALL KIKS OF THINGS' 32550 DATR0,0,6,8,0,8 32600 DS*<8>=M'H AT T>€ EK> OF OTC OF TW HALLWAYS I CAN )CRE VOICES fCARBY SOUDS LIKE GUflRDS * 32650 DATA6,10,0/ 9,0,12 32700 DSI<9)«TH IN T>£ STRATEGY PLAWING ROOM * DATA1L 8,8,0,8 i$ 32758 DSf(10)=*I'H IN T>€ DECONTANINRTION AREA ' DATA0,14,0,8,8, 0

32800 OS*<ll)»'THIS AREA IS TIC TRACTOR BEAN CONTROL ROOM A LARGE SIGN WARNS » DO NOT PRESS AW BUTTONS « '

ingenious! A PRACTICAL DIGITAL ELECTRONIC KIT FOR

LESS THAN £20 £J>

SUPERKIT I Bff-IsLpagl i jrogaapgps ; . llliL>t»l» . ; ,

: •

^ SUITABLE FOR

O itifktlrsntM uiljUr Id tefww^

BEGINNERS

NO SOLDERING!

L e a r n I he wonde rs of d i g i t a l e l e c t r o n i c s and see hi?v quickly you are designing your own circuit*. Thr kit contain*: seven tS 111 integrated Circuits. breadboard, /.£/).«, and all the

1)11. switches, resistors, capacitors, and other component* to build interesting digital rircuits; p l u s J very clear and thoroughly tested instruction manual 'also available sepa-rately l. Ail this comes in it pocket sue plastic wallet for only C19-90p Inc VAT and pSp. Thin course ts for true thinner* - the only extra yon need I- a i)V battery. - needs no so lder ing I ron .

- asks plenty of questions, but never leaves you stuck and helpless.

- teaches you about subsystem check ing .

This course leaches boolean logic, gating, R-S and J-K nipflops, shift registers, ripple counters, ,ind half-adders. Cheque with order to Cambndoe Leaning L,miteO._Urni 146 Hweimll i i ta. FAEtPOSl. St Ives Huntingdon.

fault linding, improvisation, and

n. Camos P£17 4BR. England Or lei 0480 67446 with credit card details

Cambridge Learning

GENIE I l»lr..n >ti itH»... I. ...itrt' ^ 3 2 K

ft : . £ 3 1 0 ^ \\ 1 y j ^ t y

Genie II business system with key pad €295.

BLACKPOOL * SOFTWARE * PERIPHERALS # BOOKS

EPSON MZ80 FT/1 & 2 £345.00

C O M M O D O R E VIC 20

A v a i l a b l e s h o r t l y M y s t e r i o u s Adventures for VIC 20

E LEISURONICS COMPUTER STORES 64 A b i n g d o n S t ree t , B lackpoo l , Lancashi re Tel: 0253 27091 Please add 15% VAT to all prices

ATARI ATARI';

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LOW PRICE CONVERSIONS NOW BEING DONE

NOW AT SUPER LOW PRICES PLUS

EXTENSIVE RANGE OF HARDWARE A N D COMPATIBLE SOFTWARE

ALSO NEW ITEMS ARRIVING INCLUDING

"LE-STICK"

JENNINGS STORES LTD. 248 Hertford Road (Nr. Green Street), Enfield,

Middx. Tel: Tel: 804 1767.

ZX81 16K RAM

PLUG.IN UNIT

£24. 95 inc. ( A S S E M B L E D _ T E S T E D _ G U A R A N T E E D •

Cheque/PO s to: PLESSIS ELECTRONICS. CASTLE HOUSE, OLD RD. LEIGHTON BUZZARD ( b e d s ) . LU7 7RG.

7 DAYS DELIVERY 61 COMPUTER 8t VIDEO GAMES

I I I 3 1 I

FANTASTIC

MM Play Backgammon (Included)

and move your men by just pointing the pen at the screen.

Comes complete with into sheets and game cassette

Video Genie owners require a 2nd cassette or a MINI amplifier.

Tandy owners use existing cassette player. Adapt your own programs easily. Ideal for MENU selection. Tandy £ 1 ° 9 5

Model I Level II & Video Genie.

LE STICK The ultimate joystick real home arcade action brings joystick games to life, or adapt your own programs. TANDY Ml Lll £32.00 VIDEO GENIE £32.00 TANDY COLOUR £24.75 ATARI VIDEO GAME £24.75 ATARI COMPUTER 400/800 £24.75

NOW ADAPT YOUR OWN GAMES OR PLAY THE BIG

5 GAMES WITH

JOYSTICKS £22.50 single

joystick

Tandy Model

I. Lll Video Genie

The famous Atari Joystick inter-faced for your Tandy Ml Lll or Video Genie. Just plugs straight into the expansion port. Your own games easily adapted by using a simple Basic statement, or buy Joysticks Games. Galaxy Invasion. Attack Force, Cosmic Fighter £9.95 Robot Attack, Meteor Mission, Defense Command £9.95

* L 0 W COST PROGRAMS # MICROCOSM I (30 programs). 2 (20

j k . programs) or 3, (20 programs with A T sound) just £19.95 each. Send tor ™ ^ detailed lists. J i

^ T ASYLUM £11.00 LABRINTH £9.95 ^

4DEATHMAZE 5000 £9.95

GOBBLE MAM £9.95 •

TANDY COLOUR OWNERS CHR0MASETTE - j L

MAGAZINE ^ Every month 6 to 8 programs on a cassette. At low prices. 10 back issues available. Educational. Prac-tical, Utility and many games. Give your computer a cultural lesson. Trial Cassette £5.95 6 month subscription £32.00 12 month subscription £55.00

MARK DATA PRODUCTS CAVE HUNTER £19.95 Manoeuvre your way through a spooky old cave in this high action arcade game. COLOR BESERK £19.95 A sensational ht-res graphics game. The exciting combination of Evil Orville and Angry Robots will give you hours of fun. CALIXTO ISLAND ADVENTURE £17.50. A challenging and humerous adventure to find the stolen museum treasure. BLACK SANCTUM ADVENTURE £17.50. Pit yourself against the forces of Black Magic.

SPECTRAL ASSOCIATES COLOR SPACE INVADERS £19.95 METEOROIDS £19.95 A meteor mission. Hit those aster-oids with your laser. SPACE WAR. Avoid the Black Hole, fast action arcade game £19.95 GAME OF LIFE. Build a life com-munity and fight with a virus £13.95 GRAPHIC ANIMATOR. Draw pic-tures with the joysticks create ani-mation and store pictures on tape

£9.95 ARTILLERY DUEL. Engage in an exciting duel against the computer

£7.95

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CL0AD MAGAZINE i-: Tandy Model 1 or 3 & Video Genie 6 to 8 programs on a cassette each month. Trial Tape £5.75 6 month subscription £28.50 12 month subscription £52.00 Business programs. Games. Ad-ventures. Utilities. Educationals all appear in Cload Magazine.

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32850 DRTA0, 8- 9,8,8,8 32988 DS$(12)=Tt1 IN ANOTHER HALLHflY TO TJC ERST IS fl RESTROOH

32950 DATA15, 13.8,8,8,8 33808 DSS(13)='THIS IS IHAT IS COftlOHY CALLED ON EARTH- TfC BAT

(ROOK

TtfRE'S GRAFFITI *ITTEN ALL OVER TIC WALL

PIPES LEAD UP THiOUGH M CEILING *

33850 DATA15,aai2,27,8

33186 DS»<14)=-THIS APPEARS TO BE AN INTERROGATION ROOM * DATA8,

8» 18.8i 8 33158 DS*(15)=*I'M IN ft LOUNGE ' DATA0, 8,13,12,8, 8

33288 DSI(16)=*THIS IS ft COMPUTER ROOM TlCRE S ft TRS-88 IN ICK£ ON THE SCREEN IT SAYS » CSAVE TAPE « * 1*1817,8,18,0,8,8

33250 DS»(i7)="l'M IN ft TESTING LABORTORY • DATA8,8,16,8,8.8

33308 DSi(18)=*I'M IN A HALLHRY

ft LARGE ARROW POINTS EAST. AM) SAYS » TO THE VAULT « *

33350 MTR1& 25,3,191, & 0 33480 D5I(19>=*THIS IS TIC ENTRANCE TO TIC DEVELOPMENT LAB SECTI

ON* DftTfi28,18,2L28,2Z8

33458 DS$(28)=*rH IN fl LONG CORRIDOR. TlCRE ARE LflBORTORlES ALL

AROJM) It ' DATA19,23, 21, 20,22,24

33508 D5»<21)*TI1 IN ft RESEARCH LAB ' DATA2aaa8,8,8

33550 DS$(22)='1'M LOST!• DATA22,22,22,22.22-20

33600 DSf<23)=DSf(21) 08188,8,8,20,0,8

33650 DSI(24)=D5S(2i> DATfla8,8,8,20,0

33708 DSI(25)=,

rH NEAR TIC ENTRANCE TO T>C VOLT

A SIGN ICRE SflVS » AUTHORIZED PERSWCL OM.V « '

33750 DATA0,26,8,18,8,8 33800 DSI(26)=*rf1 IN TIC VAULT * DflTflB, a 8,25,0.0 7

3850 DSS(2?)=*I'M IN ft PIPE TUtCL W1CH LEADS IN EVERV DIRECT!

ON *: DATR2&27,27,27,27,13 33908 DS$(28)=C5*<27) :DATfl29,29,29,29,3a 29

33950 05l(29)>a

rN LOST IN fl NAZE OF PIPES-":DATR2a 29,29,29,29,

27

34000 OSI(30)=TH IN TIC PIPE HftZE

BELOW IC I THIHC I CAN SEE TIC JAIL •

34050 DATA29,29,28,29,29,31

34180 D5I<31)*'I'H IN TIC JftIL '

34150 DATA32,33,34,35,0,0

34280 DS»(32)**I'H IN ft JftIL CELL * DATA8,0,3L0,0,0

34250 DSI(33)=OS$(32) DATA0,0, a 3L 8,0

34388 DS»(34)=OSI(32) WTA3L 8,8,8, a 8

34350 OSI(35)='I'H AT TIC SECURITY DESK.

TO TIC NORTH AN ELEVATOR * OATAS6,3L 8,8,0,0

34400 051(36)='I'll IN TIC ELEVATOR ' DflTflB, 8,35,8,37,8

34450 D5S(37)=0SI(36) DATftB,0,14,8,0,36

34850 L023 DIMOW(LO)

34900 ®S(l)='ft TAG IMCH SflVS » ICEDS TURBO « ' DATAli.5,0

34950 0B*(2)='ANT I-HATTER FICL' DATftl2,5t5

35880 0B$(3)='BLASTER' DATA13,7,8

35050 0B*(4)='CfiffUNICAT0R* DATA14,9,0

35108 0B*(5)=*fl VERY SJ!PRISED GUARD' OATA15,9,0

35150 0B$(6)=*MAP OF TIC SHIP' DATA16,29,20

35208 0Bt(7)=*SCtt KEYS' DATftt7,9,8

35258 0B$(8)s"A 9l!ICST0tt ICCKLACE* DATtoai0,20

35388 CBI(9)=*PRINCESS LEYR'S CflPE' DATft2L14,5

35358 O8$(10)=*HCDGNALD'S HftfSJRGER" DATA22,15.8

35458 0B*(12)=*A TUR80ENCABULATOR* DATR24,17,5

35500 06S(13)=*AN EVIL LOOKING SCIENTIST' DATR25,1?,0

35550 06S(14)=*SECRET ATTACK PLANS' DATA26,8,20

35608 Q6l(i5)="D£ATH RAY SOCNfiTlC* DATA27,9,20

35650 061(16)='CLOAKING DEVICE* DATR2S, 17,20

35788 Oe$(17)=*HICRO LASER GUN' DATfi29,24,20

35750 0B*(18)=*I D CARD*:DATfi31,17,0

35800 08$(19)=*MALIDIUN CRYSTALS (THE TREASURY')' DATA32, 26, 30

35850 OB$(20)=*H SIGN miCH SAYS » OUT OF ORDER « ' 0ATfC3,3,8

35900 0B$(21)=*flTTACK ROBOT* 0ATA34,35,8

35950 0B*(22)=*PRINCESS LEYfl* DATR35,34,M

36000 Ge$<23)='•fmJNlT10N,

DATA37,7,8

36150 DIIt>S(CL, 5) RESTORE

36200 F0R2L=lT0a FOR2D=0TO5

36250 REflDDS(ZL,ZD):NEXTZD NEXTZL

36300 DINOB(LO,2)

36350 FORZL=1TOLO READ06(ZL> 0), 06CZL1), 06(ZL, ?) ICXTZL

36500 DIltCltCL)

36550 (C*(1)='I THINK IC'RE SUPPOSE TO LEAVE TIC STUFF ICRE *

36608 **(2)='I HOWER IF £ HAVE ENOUGH FUEL?*

36650 HEI(7)=*H0W 'BOUT fl BLASTER *

36700 ICI(9)=*TRY SHOOT GUARD *

36750 HE*(13)='IT MIGHT BE INTERSTING TO READ TIC GRAFFITI '

36800 hEf(17)="TRY SHOOT SCIENTIST '

36850 ICt(22>=*rn AS COtFUSED AS YOU ARE ' K$(29)=ICS(22)

36900 IC$(31)S

*IT MIGHT ICLP IF IC HAD SOtC KEYS TO OPEN fWt LOC

KED DOORS "

36950 IC»(35)=*D1D YOU BRING AWiTHING TO EAT?*

37100 H0f=*I CAN'T GO TlCRE TIC DOOR IS LOCKED '

37150 m$=,

I'h NOT CARRYING f W BLAMC TAPE *

37200 M2*=*TIC TRS-80 RECORDED SOUTHING ON TIC TAPE, flf© TICN 1

T PRINTED

» ATTACK PLANS ~ VERS" SECRET « *

37250 H3*=*I CflN'T I'M NOT CARRYING ANY KEYS *

37300 M4<-'0 K TIC DOOR TO TtC JAIL CELL IS UNLOCKED '

37350 K5*='TICR£'S MO ROBOT ICRE *

37400 M6$='B0T I DON'T HAVE A W HATKRGERS '

37450 M7$='CHUNP CHIP BURP1

TIC PRINCESS THflNCS YOU FOR fl DELICIOUS ICflL '

37500 M8$=" DOESN'T EAT HfWLRGER *

37550 M9I-'M0THIMG HflPfElO TIC HffBJRGER IS COLD YOU KNOU *

37600 N8$='T)C ATTACK ROBOT EATS TIC HANBERGER fH.- DISSAPEARS '

37656 Nlf^rM RT TIC IDENTIFICATION TERMINAL

ON THE SCREEN IT SAYS: » SHOW I D « *

37700 N2^=*THE TRACTOR BEflM IS OFF *

37750 N35=*THE TRACTOR 8EflM IS ON *

37800 N4M*Y0U FORGOT TO OPEN THE FLIGHT DECK DOORS *

37850 RETURN

commodore

COMPUTING } ^

i

OWN OR USE A PET OR A VIC? FED UP WITH BEING IGNORED BY ALL THE TRADITIONAL MONTHLY MAGAZINES? FED UP WITH LISTINGS WHICH ARE TOO SIMPLE OR SIMPLY DO NOT WORK?

YOU NEED COMMODORE COMPUTING, THE NEW MONTHLY MAGAZINE. IT IS PUBLISHED BY NICK HAMPSHIRE, AUTHOR OF THE PET REVEALED, PET GRAPHICS, A LIBRARY SUBROUTINES AND THE VIC REVEALED. EACH ISSUE IS PACKED WITH ADVANCED ADVICE ON HOW TO MAKE THE MOST OF YOUR COMPUTER, WHETHER YOU USE A PET OR A VIC AND WHATEVER YOUR APPLICATION. SOFTWARE, HARDWARE, MACHINE CODE, GAMES, BUSINESS USE — IT IS ALL COVERED IN EVERY ISSUE.

IF YOU WANT TO LEARN MORE ABOUT YOUR COMPUTER TAKE OUT A SUBSCRIPTION TO COMMODORE COMPUTING. IT IS THE ONLY WAY TO GET IT, AND GET IT STRAIGHT.

SEND £12.50 FOR A SUBSCRIPTION FOR 1 year (10 ISSUES) TO:

COMMODORE COMPUTING, MAGSUB, OAKFIELD HOUSE, PERRYMOUNT ROAD, HAYWARDS HEATH, SUSSEX RH16 3DH.

64 COMPUTER & ViDEO GAMES

0 REK BOINS BY RON WEBSTER

ATARI TRANSLATION BY JAMES 6AR0N

5 Din BK10):FDR 1=1 TO 10:READ X:BI(I

)=CHR»(II;NEXT 1

10 GRAPHICS 0:POKE 82,5:POSITION 9,1

15 ? 'I I t B 0 I N 6 1

I I »*:?

20 ? 'Don't let Bouncing Barney down!'

25 7

'Barney likes bouncing, but tie'

JO 'has trouble staying on his*

J5 ? 'tratpoline. Use the joystick'

40 ? 'to keep it underneath hi*. If"

45 ? 'he hits the left side of the'

50 ' 'traapoline he bounces to the'

55 ? 'right. If he hits the right'

60 ? 'side of the traapoline, he*

65 ? 'bounces to the left. This if

70 ? 'fects Barney's bouncing »ore'

75 ? 'and tore as the skill level'

80 ? 'increases, and takes it harder*

BS ? 'to keep hia in the air. See'

90 ? *ho» long you can keep Barney*

95 ? 'bouncing.':? :"> *6ood luck !! '

100 ? '(Barney needs it!l*

110 OPEN I I , 4 , 0 , T

120 ? ' Skill level (0-9)?';

125 SET 11,0:0=9-48

130 IF 0(0 OR 0)9 THEN 125

140 H=(Q+2)/4:GRAPHICS 5:P0KE 752,1

145 SETCOLOR 4(10,2:SETCOLOR 2,4,2

150 SETCOLOR 0,4,2:SETCOLOR 1,8,12

155 COLOR 1:FOR 1=0 TO 5:PLOT I,39:DRA

KTO I,0:NEU I

160 DRAWTO 74,O:F0R 1=74 TO 79:PL0T I,

0:CRANIO I,39:NEIT I

170 E=1:P=16:A=39:B=A:D=E:C0UNT=1:V=14

172 C=INT(RND(0)t2+l)IH-3/2tH

175 POKE 656,0:POKE 657,P:? Bf;

180 FOR 1=0 TO 16:FOR 1=15 TO 32 STEP

17:POKE 656,0:POKE 657,X:? CHRKI);

185 FOR J=1 TO 10:NEIT J:NEIT IiNEIT X

190 POKE 657,16:^ CHRKI 1>;:FOR Irl TO

BY RON WEBSTER

RUNS ON AN ATARI IN 8K

•;:FOR 1=34

B A R N E Y l i k e s

b o u n c i n g . I n fact

h e l i kes it so m u c h

h e b o u n c e s every-

whe re . He b o u n c e s

off w a l l s . He b o u n c e s

off c e i l i n g s . He e v e n

b o u n c e s o n a

t r a m p o l i n e . But so far h e h a s

f a i l e d to work ou t tha t b o u n c i n g

off the f loor is h a r m f u l to h i s

h e a l t h . Y o u h a v e to pro tec t

B o u n c i n g Ba rney from h i s o w n

fol ly b y m a k i n g sure t he tram-

p o l i n e s tays u n d e r h i s f l y i ng

b o d y a s h e hur t l es u p a n d d o w n .

There a r e ten sk i l l l eve l s to t h e

g a m e — bu t b e w a r n e d . Level

zero is so e a s y you m i g h t w a n t to

b o u n c e d i rec t ly to leve l n i n e .

Don' t d o itl Level n i n e is for

p e o p l e w h o don ' t m i n d s e e i n g

the ir efforts resul t i n m e s s y con-

s e q u e n c e s . St ick to t he l ower

l eve l s un t i l y ou h a v e d e v e l o p e d

your sk i l l — for Barney ' s s ake !

50:NE*T I:POKE 657,16:''

TO 39

200 COLOR 2:PLOT X,B:F0R 1=1 TO 10:NEI £

T I:COLOR 0:PL0T X,B:F0R 1=1 TO 50:NEI

225 IF 5)8 AND S<12 AND P>2 THEN P=P-1

230 IF S>4 AND S38.5 THEN ? * Boing";:60T0 2

50

245 ? B»;

250 COLOR 0:PL0T lNTfA),INT(B):A*A-CtB

=6-D 255 D=D-0.4

260 IF A<6 THEN A=6:C=-C:GOSUB 400

265 IF A>73 THEN A=73:C*-C:60SUB 400

270 IF B<1 THEN B=1;D=-ABS(D>:E=E-RND(

0)-1:GOSUB 400

275 IF B<38.5 THEN 320

280 B=39:D=E:V=14:LEFT=P+P

285 IF INT (A) >LEFT AND INT (AXLEFT+14

THEN 310

290 ? :? 'S P L A T ! ".COUNT;* Bounc

e';:IF COUNT)I THEN ? V

295 COLOR 2:PLOT INT(A),INT<B):F0R V=1

4 TO 0 STEP -0.1:SOUND 0,253,12,V:NEIT

V:IF C0LWT=1 THEN ?

300 ? ' Skill level »as *;fl:60T0 1

20

310 IF B>38.5 THEN CQUNT=C0UNT+l:E=E+R

ND(0)/2:C=(A-8-LEFT+RNC(0))IH/4

320 COLOR 2:PLOT INT(A>,INTIB):60T0 22

0 400 SOUND 1,200,10,8:F0R TIHE=1 TO 10:

NEXT TINE:SOUND 1t0,0,0;RETURN

450 DATA 32,17,18,18,16,18,18,5,32,32

PRACTICAL PROGRAMMING

mmmmmm

THE WAY TO BETTER PROGRAMS Basic was designed to be

easy to learn, so that people who

are not professional program-

mers can write s imple programs

for themselves.

It is not easy to write long,

complicated programs in any

language, and is particularly

difficult in Basic for several

reasons, the ma in reason being

the lack of sui table control struc-

tures.

In order to write a Basic pro-

gram that works properly it is

necessary to begin by des ign ing

the program carefully, and pro-

ducing a detai led specification

before beginn ing to write the

code.

Top-down structur ing is a

method of program design where

we begin with a general descrip-

tion of the program. Step by step,

we add more detai ls of the pro-

cedures the program must per-

form until we have a description

that is sufficiently detai led to

al low us to specify the data

structure and write the code.

We need to use only a few

simple structures in the descrip-

tion:

1. A sequence of procedures that

are executed one after the

other.

2. IF condition THEN procedure. If

cojKfifion is true perform pro-

cedure, otherwise cont inue

with the next section of the

program.

3. IF condition THEN procedure J ELSE procedure 2. If condition

is true perform procedure 1; if

condition is false perform pro-

cedure 2; then continue with

the next section of the pro-

gram.

4. REPEAT procedure UNTIL con-

dition. Perform procedure, then

test condition; if false loop

back to procedure, if true con-

tinue with the next section of

the program. Note that the

test comes at the end, so that

BY TED BALL 66 COMPUTER 8t VIDEO GAMES

5

6.

the body of the loop must be

performed at least once.

WHILE condition DO proce-

dure. Test condition; if true

perform procedure then loop

back to test condition aga in ; if

false cont inue with the next

section of the program. Note

that here the test is performed

first, so that the body of the

loop need not be performed at

al l .

CASE i OF procedure 1, proce-dure 2 , . . p r o c e d u r e n. If i is 1

perform procedure I, if i is 2

perform procedure 2. etc,

The essential property of these

structures is that they each have

a single entry point at the begin-

n ing and a single exit point at

the end. This makes it possible

to write a program outl ine where

t he l o g i c a l f l ow p r o c e e d s

straight through from beg inn ing

to end.

It is not possible to write Basic

code like this because G O T O

statements make the logical flow

of the program j ump around al l

over the place.

SIMPLE GAMES To illustrate top-down struc-

turing I wil l show how a s imple

g a m e p r o g r a m c a n b e

developed. The game is one that

has been publ ished in various

forms, sometimes in the s imple

form described here, but usua l ly

in a more sophisticated form

with extra features.

The object of the g ame is to

shoot down a p lane which moves

across the screen. The gun is

fixed in the centre of the bottom

line of the screen and is fired by

pressing a single key.

W e b e g i n w i t h a t r i v i a l

description of the program:

REPEAT play game.

UNTIL g ame over.

To elaborate this we take the

procedure "play game" and note

that it can be divided into two

parts, upda t ing the d isp lay a nd

h a n d l i n g i n p u t f r o m t h e

keyboard, so the descript ion

becomes:

REPEAT update display

hand le input

UNTIL g ame over.

"Upda t e d i s p l a y " invo lves

moving the plane, moving the

shell if one has been fired, and

t ak i ng app rop r i a t e act ion if

there is a hit. At first sight it may

appear that we can expand it to:

move p lane

IF shell fired THEN move shell

IF hit THEN p lane destroyed

But if we look more closely af

the possible positions of the

p lane and shell we see that we

may have the shell immediately

to the right of the p lane so the

p lane will run into the shell. Or

we may have the shell one place

to the right a nd one l ine below,

in which case the hit will occur

after both the p lane and the shell

have been moved. Our next

expansion of "update d isp lay"

could be:

move p lane


IF shell fired THEN move shell


Before cont inuing with this

part of the program we need to

look at the "hand le input" sec-

tion.

The description of the program

says nothing about when and

how often the gun may be fired.

Program descriptions are often

inadequate but top-down design

wil l reveal where the deficien-

cies are.

If the gun could be fired con-

tinuously there would be no

point to the game , so we must

introduce some restriction. Two

possibil i t ies are to provide a

l imited supply of ammuni t ion , or

to a l low the gun to be fired once

each t ime the p lane starts on a

new line.

If we provide a l imited supply

of ammun i t i on and al low the

H PRACTICAL PROGRAMMING

gun to be fired at any time while there is ammuni t ion remaining, there could be several shells in motion at one time. To keep the program simple 1 will use the second possibility.

The "handle input" procedure can now be expanded easily. We have to first check that the gun can be fired — which means that it has not been fired since the plane started on its present line — and if so check for a key and fire a shell if the key has been pressed. The expansion may be written in stages as: IF gun enabled THEN handle input

IF gun enabled THEN check keyboard

IF key pressed THEN fire shell and finally: IF gun enabled THEN check keyboard IF key pressed THEN set initial shell position

write shell to screen set "shell fired" flag clear "gun enabled" flag

THE LISTINGS Collecting together the sec-

tions that have been developed so far gives listing 1. From this we can see that the procedures we need to expand now are "move plane", "move shell" and "plane destroyed".

When we e x p a n d " m o v e plane" we must remember to check for the p lane hav ing reached the end of its run half-way down the screen or having reached the end of a line on the screen. Thus the first step in the expansion is:

write blank to current p lane pos-ition

determine new plane position

write plane to new plane posi-

tion

and for the next step we intro-

duce the checks by expanding

"determine new plane position"

to:

move plane position one place to

right

IF end of l ine THEN set up for

new line

IF end of run THEN set up for new run.

and expanding "set up for new line" and "set up for new run" we get:

move p lane position one place to right IF end of line THEN set plane

position to start of next line decrease score value set "gun enabled" flag

IF end of run THEN add 1 to plane count

set p lane position to start of screen

set score value to initial value set "gun enabled" flag "Move shell" is expanded in a

similar way, but remembering to delete the shell when it reaches the top of the screen: write blank to current shell posi-tion

move shell position up one line IF off screen THEN clear "shell fired" flag

ELSE write shell to new posi-

tion

"Plane destroyed" appears in two places and in the final pro-gram we will obviously want to implement it as a subroutine.

To i nd i ca te this we w i l l replace "p lane destroyed" in the body of the program description by " s u b r ou t i n e ( p l ane des-troyed)" and put the expansion in a separate section at the end.

The expansion of "subroutine (plane destroyed)" is straight-forward: clear "shell fired" flag simulate explosion on screen add score value to player's score set up for new run with "set up for new run" being expanded in exactly the same way as before.

This leaves the f ina l test "game over" to be expanded. Since the game consists of shoot-ing at a fixed number of planes "plane count more than number of planes".

Putting these latest expan-sions into the program descrip-tion of listing 1 gives the final program description shown in listing 2.

This final description gives almost all the detail we need to write the program.

Listing 1: Intermediate Program Description

REPEAT move plane IF hit THEN plane destroyed IF shell fired THEN move shell IF hit THEN plane destroyed IF gun enabled THEN check keyboard IF key pressed THEN

set initial shell position write shell to screen set "shell fired ' flag clear "gun enabled" flag

UNTIL game over.

Listing 2: Final Program Description REPEAT write blank to current plane position

Imove plane position on place right tF end of line THEN

set plane position to start of next line decrease score value set "gun enabled" Hag IF end of run THEN add 1 to plane count set plane position to start of screen set score value to initial value set "gun enabled" Hag

write plane to new position IF hit THEN subroutine (plane des-troyed) IF shell fired THEN write blank to current shell position

move shell position up 1 line IF off screen THEN clear "shell fired" flag ELSE write shell to new position

IF hit THEN subroutine (plane des-troyed) IF gun enabled THEN

check keyboard IF key pressed THEN

set initial shell position write shell to screen set "shell fired ' flag clear "gun enabled" flag

UNTIL plane count more than number of planes

Subroutine (plane destroyed): clear "shell f ired" flag simulate explosion on screen add score value to player's score add 1 to plane count set plane position to start of screen set score value to initial value set "gun enabled" flag


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6 Days a w e e k fo r a same day serv ice

WHY WAIT TO PAY MORE? FAST IMMEDIATE DELIVERY Post To Dept cvGs KAYDE ELECTRONIC SYSTEMS 46/49 Exmouth Road Great Yarmouth Norfolk ISIR30 3DP Tel 0493 57867

PLEASESEND ME RAM PACK/S C32.95each^ PLEASESEND ME CASED KEYBOARD/S £37 96 each PLEASE SEND ME UNCASED KEYBOARD/S£27.95 each PLEASESEND ME KEYBOARD CASE/S £10 9 6 » c h

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Please add £1.50 P&P and make cheques payable to Kayde Electronic Systems.


THE IMPORTANCE OF CURVES... If you want to produce interest-ing d isp lays for your video games then it is essential to be able to draw curves.

Straight l ines tend to be character is t ic of man-made structures and not of natural objects. Most h igh resolution graphics systems on micros have commands such as DRAW or PLOT for drawing straight lines, but do not have commands for drawing curves. For this reason, a curve has to be approximated by a series of linked line seg-ments.

The shorter the segments are. the more a realistic the approxi-mation to the curve becomes. The limit to which this can be taken is determined by the resolution of the display screen. With any system having a screen resolution of, say, 256 by 192 or better, convincing curves can be drawn by joining points in adja-cent screen columns as long as their vertical separation is not too great. These thoughts natu-rally lead to the problem of scaling.

The basic idea with scaling is that when a particular curve is to

be drawn it must be scaled —

magnif ied or diminished — in

such a way that it fits on the

screen, and is also displayed to

best effect.

This is probably best illus-

trated by an example, so let us

examine how to draw two cycles

of a damped sine wave on the

Atom's screen, which has a

resolution of 256 by 192. With a

damped sine wave, the size of

the oscillations decreases as the

waveform proceeds. The equa-

tion of the curve we shall plot is:

Y = SIN (X) * E X P < - X8) Now two cycles are obtained

by letting X vary from 0 to 4TT. TO plot the curve across the screen with full resolution, we start with a dot in column 0, on the left of the screen, and repeatedly draw a line to a dot in the next column, doing this 255 times until we get to the right hand side.

To make X increase from 0 to 4tt in this pattern, it must be repeatedly increased by incre-ments of 4W255 . Thus the kernel of the program becomes

FOR f - 0 TO 255 X = i * < 4 * P I 2 5 5 ) Y SIN ( X ) * EXP ( X 8) DRAW I. Y NEXT I

However, the vertical axis still needs to be scaled. The curve shows to best effect with its

x-axis across the middle of the screen, so we place it along row 95. Assigning 90 dots vertically to the full ampl i tude of the sine wave gives the final, tided-up. Atom program.

10 %S = 4 * P I 2 5 5 20 CLEAR 4 30 MOVE 0, 95 40 FOR I = 1 TO 255 50 %X I * %S 60 %Y = % ( 9 0 * SIN(%X) * E X P ( %X 8)) + 95 70 DRAW I, %Y 80 NEXT I 90 END

Experimenting with this pro-gram by changing the numbers in it will give a further feeling for how the scaling, positioning and damping are achieved.

To illustrate how simple mat-ters such as scaling and posi-tioning can be made, consider the drawing shown in the figure, which includes not only our curve, but also two axes and a label. It was drawn using a Hewlett-Packard HP7225A graph plotter attached to an HP 83 per-sonal computer. The program that produced it is:

10 GCLEAR 20 SCALE 0. 4 * P I . - 1 , 1 30 XAXIS 0 PI 2 40 YAXIS 0 0,5 50 MOVE 0.0 60 S •= 4 * PI 255 70 FORX - S TO 4 * PI STEP S 80 DRAW X. SIN (X) * EXP ( X8) 90 NEXT X

100 CSIZE 6, 0.5. 0 25 110 MOVE PI. 0.2 120 LABEL DAMPED SINE WAVE" 130 END

In this program the SCALE instruction in l ine 20 gives the lower and upper limits of the X values to be plotted and also of the Y values. All plotting can then be performed using the actual values to be plotted since

the system can then automati-cally position them correctly.

Of course, the HP personal computer is a sophisticated and e x p e n s i v e sy s t em , but i ts capabil it ies illustrate what can be done, and also the direction which graphics facilities for micros are likely to take.

By Gary Marshall

E SOFTWARE SOFTWARE SOFTWARE SOFTWARE SOI

THE GOSPEL TRUTH ... Have you heard any claps of thunder recently? It could be that someone in your area has bought a copy of The Bible Not the authorised version or ever the New English but the version according to Automata — and in doing so has angered the almighty!

The Bible is an irreverent look at some of the happenings in that epic story. The extracts are illus-trated by games played on the ZX81 computer. There are ten games and all of them are within IK of memory.

THE BIBLE Don't just load the games

though. Unplug the ear lead and listen to the story recorded on the tape. The nearest I can come to describing it is a version of Not the Nine O'Clock News on tape.

The characters on the sound-track will tell you when and how to load the programs which sup-plement the text.

But what of the programs? As I said they are all IK and of necessity, therefore, l imi ted. ,

Most of them I have seen before in one form or another.

I did find one or two quite amusing. Goliath's soft spot is no longer his forehead but some-where lower down and almost as painfull. You can also bring down the plague on the Pharoahs head and free the slaves. Save Jonah from the sea monster by direct-ing the whale to him fast. Stop the Ark from sinking or tempt Adam away from the evil J ZX81.

If you have just bought a ZX81 then this tape will provide some amusement. The same might apply if you have a warped sense of humour. Otherwise I can find little of any value in it for those of you looking for original games software.

The Bible is available from Automata Cartography for £5.00.

. X / /

CUBE WILL HAVE YOU IN A SPIN QUADCUBE

There seems to be very little middle ground with The Cube — either you can't stop twiddling it or you just don't want to know. Here's a game for the fanatics.

This program simulates a 4 x 4 x 4 cube — physically very difficult to make, but easy on a computer. The program can to a limited degree simulate a 3 x 3 x 3 cube. The object is — ot course — to solve the cube in as few moves as possible.

In Quadcube the display is slightly distorted but recognis-able. I liked 'co fidence tones' on the key presses — all input is handled by call key' routines, and there is an immediate indica-tion that your pressed key has been scanned.

Documentation supplied was of a high standard. There is also adequate internal documentation for when, as always happens, you

lose the instruction sheets. The game has its restrictions

The graphics are unsatisfactory on a monochrome set and it will not run in extended BASIC.

The notation used is very sim-ple and easy to use, but I was a little unhappy with "spin" and "unspin" which permit you to view the back. The effect of "spin" and "unspin" seems to be to present you with a mirror image — or to make the front three faces transparent. This makes the moves a little hard to visualise.

In this version all rotations are described as they appear on screen — clockwise is described as right.

I would have appreciated a small note on screen to indicate which face was X. which Y, and which Z. Memory space is tight but the program can be com-pacted to permit this, without losing any features.

You can scramble a virgin cube and watch the computer put it back, or the computer wi l l scramble the cube.

The game runs on a Text.. Instruments 99/4A in Tl Basic and comes in cassette form for £9. It is available from Luton based Workforce.

DOING THE SHUTTLE SHUFFLE... SPACE RESCUE

Five spherical life support pods are stranded on hazardous alien terrain. In space the mother ship prepares for a rescue mission,

The mother ship has a rescue hatch and a storage area to accommodate all five pods. The ship's recovery shuttle — con-trolled by means of the Pet's keypad — is sent to save the pods.

The shuttle is released by pressing '2' to move it down-wards. From this point on your score increases by one for every second you survive.

To rescue a pod, the shuttle must be positioned immediately above* it, then the 'A' key pres-sed. This manoeuvre can be very difficult on the higher skill levels since the shuttle moves rather fast and the control key becomes highly responsive.

Next the shuttle should be guided to a position just above the mother ship and the pod

dropped through the rescue hatch by pressing 'D'. If your aim is correct, the pod appears in the storage area If you miss the hatch the pod lands back on the planet surface.

If you manage to complete your rescue mission and save all five pods, you are invited to dock with your moving mother ship for a bonus of 500 points

Once you have successfully carried out a rescue you can progress to slightly higer skill levels building up your expertise until you have used up your four lives.

The more difficult the game gets the more interesting it becomes. Not only do you have to guide your ship accurately you also must fend off meteorites which fty dangerously through the sky

No additional documentation was supplied with the game which would have been useful. The instructions only appear on the screen briefly, once, after loading so some experimentation was needed to learn the finer aspects of the game

Supersoft, the supplier of Space Rescue, has created another addictive game because like most good ones it cannot be easily mastered You can try it out for £8 plus VAT.

I

O FTWARE SOFTWARE SOFTWARE SOFTWARE SOFTW

FINE ART OF SPACE FIGHTING GAMESTAPE 2

You can journey to the stars, unravel the mysteries of the pyramids or become an artist with Gamestape 2, which has three 16K programs for the ZX81. First on the tape is Slaughter.

The enemy are trying to des-troy your civilisation. You must stop them by flying your Star-fighter and shooting them down with your lasers.

The screen displays the view from your cockpit with stars and a firing cursor in front of you. The cursor, your laser sights, are con-trolled by pressing keys one to rone. while the zero key fires the laser.

This layout can be confusing until you get used to it. I used a stickty label on the keyboard to remind me of the keys that give the diagonal moves, one to four.

The enemy starships are shown as H, X and 0 on the screen. Each has a different score value. If you can manage to hit twenty of them before your energy runs out you get a replay. I would have liked to have seen two or thress starships on the screen at once or see them fire back to liven the game up a bit.

Second on the tape is Pyramid — the classic pu«le where a

DUCKING AND WEAVING UP IN THE STARS

pyramid has to be moved from A to B via C piece by piece.

The pyramid shown on the screen has nine layers and the pads lettered A, B, C and a promt are also displayed Movement is control led by pressing the appropriately lettered keys, the computer will automatically move the top layer of the pile. This game takes a very long time to play, the suppliers reckon that 511 moves are the minimum.

Turning over the tape gives us Artist. The usual "draw a picture on your television screen" type

program. However this one does have some major differences. After you have finished your drawing you can store it in one of 10 memories for retrieval later if you wish.

If you own a Sinclair printer the drawing can be copied on to it. The sticky label used in Star-fighter can also be used here as the input commands are the same.

This tape must be rated as good value for money and is available from J.K. Greye Soft* ware, ot Bath, and costs £4 95

COSMIC ZAP Cosmic Zap is one of the new games for the Sharp MZ-80K from the London based firm — Sharpsoft. Written in Basic in under 6K it is fairly slow for a real-time graphics game. How-ever. the quality of finish is very high with some nice trimmings such as storing the top five high scores and initials

The aim of the game is to pilot your ship through space for ten minutes using left, right and stop controls to dodge asteroids whilst trying to ram assorted aliens with scores ranging from 10 to 100 points. After a while asteroids start appearing in your path and an alien you are about to ram can suddenly turn into a deadly asteroid If you last 10 minutes, which is some teat, a mother ship appears and uses a tractor beam to draw you in for docking.

At £5.85 all the Sharpsoft games are quite expensive and I do not feel that this game rep-resents such good value tor money as say Asteroids or Stockmarket F. As far as I can tell there are no good tactics in this game of reflexes, although on the whole I found it quite good tun.

FULL STEAM AHEAD ON THE MICRO RAILROAD It is not often that a game that is entirely different to any other on the market makes an appearance, but I believe that Microtrain is one of these rare creatures.

Imagine that you are back in your childhood with hundreds of pounds worth of electric train set to play with then you get the basic idea of Microtrain.

Depending on the memory available you can play with up to 255 trains with a combined number of coaches/wagons of up to 255 You are also allowed up to 255 controls, and this is where the game gets interesting as the controls may be set to react depending on the conditions on the track.

The controls that you have available are points, signals,

mm speed and direction of trains and the stopping of trains for set periods of time.

Obviously some of the realism is lost in the limited graphics available on the TRS-80 and Video Genie, but if you accept this you have an unusual and

appealing game. Be warned though, the auto-

matic controls are not easy to master, something that is not helped by the limited instruc-tions supplied — maybe a demonstration mode would have helped Once a suitable layout is

achieved, the screen after screen of track may be saved for future loading.

Microtrain is available from Premier Publications of Croydon. It runs on a Tandy TRS-80 model I or 111 and the Video Geme costing £16.95 for the disc version and £14.95 for the tape

oO

gm> n

"Give me one good reason why I should

choose a VIC 20 home computer" 1. VIC is outstanding value

for money. No other colour home computer can give so much for under £200.

2. Total standard memory 25K made up of 20K ROM and 5KRAM.

I Fully expandable to 27hK

user RAM.

4. Microsoft Basic inter-preter as standard.

Accessible machine language via plug-in cartridges.

(IL Connects direct to monitor or standard television

7 Full size typewriter style keyboard.

H. Full colour and sound.

All colours easily accessible.

Hit 62 predefined graphic characters direct from the keyboard.

II. Full set of upper and lower case characters.

12. 256 displayable characters direct from the keyboard.

11 High resolution graphics capability via plug-in cartridges.

14. Programmable function keys can be used with plug-in cartridges.

I I Automatic repeat on cursor function keys.

K». User-definable input/ output port.

H Machine bus port for memory expansion and ROM software.

18. Standard interfaces for hardware peripherals.

ML VIC 20 is truly expandable into a highly sophisticated computer system with a comprehensive list of accessories (see panel below).

2<l Full range of software for home, education, business and entertainment on disk, cassette and cartridge.

21. B(x)ks; manuals and learn-ing aids from Teach Yourself Basic to the VIC programmers' reference guide (a must for advanced programmers).

22. Full support for VIC owners - their own magazine 'VIC Computing' as well as a national network or VIC user groups.

21 National dealer network providing full service and support to VIC owners.

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Commodore is the leading supplier of micro computers in tne UK to business, schools, industry and the home.

2fn VIC 20 is the best-selling colour home computer in the UK.

How many reasons was it you wanted?

Accessories include: • Cassette tape unit. • Single drive 51" floppy disk unit (170 Kbytes

capacity). • 80-column dot matrix printer. • .?K,8Kandl6KRAMexpansioncanTidges. • Programming aid packs; machine code

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• Plug-in conversion box for a full 32K, 4()-column x 24 lines VIC including Prcstel com-patability

• RS 232C communication cartridge. • Memory expansion board. • 1EELM88 interface cartridge • loysticks, light pens, paddles and motor

controllers.

O commodore V I C 20

The best home computer in the world.

FOR MORE INFORMATION ON THE VIC 20, TELEPHONE OR WRITE TO: COMMODORE INFORMATION CENTRE, 675 AJAX AVENUE, SLOUGH, BERKSHIRE. TELEPHONE SLOUGH 79292.

wr

THE POWER OF THE ATOM... It is refreshing to see, in these times when the reliability of some newer machines has yet to be proven, an already well established product which can be expanded from a useful basic kit to a powerful multi-program microcomputer. I have been looking over a kit built Acorn Atom — and found it to be just that.

The Atom is a single board layout, measuring 14 by eight inches. The basic kit has an 8K BASIC and 2K of RAM but can be

expanded to 12K RAM. The MPU is the trusty 6502 running at 1MHz, although there is a second crystal to run the Motorola video chip. Make sure which is which, as they are both the same size and shape. Only the numbers are dilferent.

The full QWERTY keyboard is mounted on the other side of the board from the components as is the speaker. The power supply is entirely separate, however.

The Atom has an advantage over some of the smaller and more recent machines in that it has the facility for a 6522 Ver-satile Interface Adaptor (VIA) on the board.

The Atom also allows for other input/outputs. There is a printer interface, which uses one half of the VIA, a standard CUTS inter-face for the recording or playing back of programs, a composite video and T.V. output. Not all of these are fitted as standard to the basic model, so find out which ones you are going to need before buying as it will be slightly cheaper.

As there are 52 potential IC sockets on the board it is worth mentioning that 14 pin sockets will go into 16 hole sets, as will 14 and 16 into 18 hole sets. If you do soldeT in the wrong size it is olten impossible to retrieve it unless you have an IC desolder-mg tool for your soldering iron.

The only real way to extract them otherwise is to force the plastic mou ld ing off and to remove the pins individually. You will have to replace the holder then, of course. The same applies to the larger sockets, although these are a little easier to differentiate between.

One major point that does worry me about the Atom is the way Acorn have arranged the keyboard, however smooth it is to operate. Acorn recommend a quite simple way of installing it in the instructions. They also state that insulating washers should be used with the steel

screws to prevent shorting out of the keyboard matrix. This is because all but one of the screws falls between two adjacent pads.

Although the model I was appraising did not have any washers, with the length of con-nector wire on each of the keys it is possible for them to short out despite this precaution. They also suggest that you do not sol-der each of the connections too heavily as you may break the plated-through hole. It appears to me that it would be as easy to fracture the lead as it would the pad when the solder contracts as it cools. This would lead to an almost incurable fault as all the keys would have to be removed before repairs could be effected. 1 am sure the solid contact type would be preferable.

The board has been con-structed well on thicker-than-usual piece of fibreglass with

silk screen overlay to help place the components.

There are a few components, however, which have to have their legs bent quite consider-ably to get them positioned cor-rectly. I am sure that some of the capacitors and especially the crystals could be damaged eas-ily by this action by an over-zealous assembler.

Everything else seems to go in quite neatly even though the vol-tage regulators do look a little hidden from view by their com-mon heat-sink.

As is usual with the better designed kits the holes for the transistors are la id out for insulating pads although these are not included. Thankfully these transistors are of a larger body type than the ones which started off my campaign, and should tolerate a little more heat than those could.

As all the IC holders are sup-plied take care that you insert the right chips in the right sock-ets. Fortunately, all the chips are orientated with pin one towards the top or right of the board, wh i ch h e l p s c o n s i d e r a b l y . Another point about orientation is the electrlytic capaci tors which are used to smooth the power supply. They are scat-tered around about the regu-lators and vary in their direction of polarity. Each is marked with its own polarity as is the board where it resides, so there should be no excuse for getting it wrong.

The Acorn Atom comes in a very sturdy case which is the size of many machines' keyboard alone. Even though not all the possible options are included in the basic kit the back panel is already cut out to accept them all. It would be a good idea to block up the larger holes to pre-vent dust and dirt from getting into the machine, so long as the regulators do not get too hot.

The power supply, as I said is separate from the machine, and plugs into the back of the box. It is heavy enough to power all of the options and more. External power is avai lable from one of the back connectors if required.

T E X A S I N S T R U M E N T S

With the Home Computer from Texas Instruments, you can converse in the five major languages: BASIC, PASCAL, TI-LOGO, ASSEMBLER and it speaks English!

When you compare the TI-99/4A I lome

Computer to its competition, you'll find it is a

truly remarkable machine. For a start, it enables

you to use the most important programming

languages. Something that is difficult to find on

other comparable computers. What's more, tt

has a large lb K Byte R A M memory capacity,

expandable to -48 K Byte. With the addition of

certain peripherals and a Solid State Software

Module a total combined R A M / R O M capacity

o f 110 K Bytes is available. The Tl 99/4 A I iome

Computer plugs into an ordinary TV set and

can be expanded into a complete computing

system with the addition of peripherals suih as

two ordinary domestic cassette recorders, remote

control units, disk memory drives, speech

synthesiser, and thermal printer. Via an RS 232

interface option, other peripherals such as

communication modems, impact printers and

plotters can be attached. With it's high resolu-

tion graphics with 32 characters over 24 lines tn

16 colours (256x192 dots), three tones in five

octaves plus noise, and BASIC as standard

equipment and options such as other program-

ming languages UCSD-PAM AL, TI L O C O

and ASSEMBLER and speech synthesis, you'll

find that the TI-49/4A 1 lome Computer more

than compares with competition. 1 specially

when the starting price is 1340 ot less. When

you want to solve problems there are over 600

software programs available worldwide

including more than 40 on easy-to-use Solid

State Software Modules.

After all. from the inventors ol the micro-

processor, integrated uriuit and microcomputer,

it's only natural to expert high technology at a

realistic price. ( | o

The T1-99/4A Home

Computer: another way we're

helping you do better.

We'll help you d o Ix'ttcr

T E X A S I N S T R U M E N T S


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personal computer software

1 6 K / Z X 81 SOFTWARE

NEW! MACHINE CODE

ARCADE GAMES "SPACE INVADERS"

Simply the best yet, this version is the near-est you can get to the real thing, on theZX81.

"ASTEROIDS" This is a de-luxe implementat ion of this game, which includes 3 sizes of asteroids, alienships, 5-levels of play & full ship con-trols.

"ARCADE-DROPOUT" Excellent implementat ion of this exciting arcade game. Destroy the aliens, before they fi l l up the chutes and destroy you.

"STARTREK" 16K STARTREK: Exciting space adventure game including klingon, starbases, phasors, 8 x 8 galaxy, etc.

"SUPER-WUMPUS" 16K SUPER-WUMPUS: Can you hunt and catch the mysterious wumpus in his under-ground labyrinth? Intr iguing underground adventure.

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" 3 D-MYSTERY-MAZE" 16K 3D MYSTERY MAZE: Amazing three dimensional maze, uses fast nvc display, hundred? of different mazes. Find your way through the maze in 3D.

"GAMES PACK 1 " 16K GAMES PACK: Fantastic value for money, nearly 50K of programs on one cas-sette. Five games including "Real Time Graphic" Lunar Lander, Starwars, Ham-murabi, Minefield, Mastermind. Prices ASTEROIDS OR DROPOUT £5.95

OTHERS £4 95 Send S.A.E. for catalogue. When ordering 2 or more cassettes deduct £1.00 ZX81, VIC and BBC software wanted, excel-lent royalties.

Cheques P.O. payable to SILVERSOFT Name Address

Dealer enquiries now welcome.

i ^ S L . 75 COMPUTER 8t VIDEO GAMES

DOWN TO BASIC

STORING AWAY YOUR SCORES

Sometimes it is necessary to store a set of related data items while processing them in a pro-gram. For example, you might want to store a set of g ame scores and then sort them into order.

To do this you can store them in a list — or, as it is sometimes k n o w n , a o n e - d i m e n s i o n a l array.

To create such a list, you must first of all inform the computer of the name and size of the list. This is done by using a DIMen-sion statement which takes the form

{line no . ) DIM (array-list) For example,

15 DIM A(30) would set up a list called A which could hold up to 30 data items. It is possible to declare several lists in one DIM state-ment.

20 DIM L1(5),L2(5),L3<100)

In general, the rules for form-ing names of lists will be the same as those for forming names of variables.

To refer to a particular item of a list, use subscripts enclosed in brackets after the name of the list. The subscript indicates the position of the item in the list.

A(6)

refers to the item in position 6 of the list called A.

A subscript may be a constant, var iab le or any other va l id arithmetic expression. If the value of the subscript is non-integer, then it will be truncated to an integer value.

The value of the subscript should lie in the range:

1 — > (size of list) In some systems, the subscript may also take the value 0.)

Elements of lists are some-times referred to as "subscripted variables", and may be used in a manner similar to ordinary vari-ables. The following are al l

BY MOIRA NORRIE

H H B

examples of statements contain-

ing subscripted variables:

10 INPUT A(2),X,L1(10)

30 LET S = A(l) + A(2)

40 PRINT B(6)

25 IF A<1) = A(2) THEN 10

30 FOR I A(N) TO A(N +6)

•

LISTS, STRINGS AND CHARACTERS

It is also possible to have a list of character strings e.g. a list of names.

Such a list may be created in a manner s imi lar to a list of numeric values except that the name of the list is followed by a

"5". 10 DIM A(10),N$(5)

would set up a list A, comprising of up to 10 numeric values, and a list N5, comprising of up to five character strings.

The subscripts of a string array follow the same rules as those of an o r d i n a ry one-dimensional array (list), and the items of a string array may be used in a manner similar to string variables.

GETTING THINGS IN ORDER . . .

A very common operation in computing is sorting a list of items into order e.g. sort a list of heights into ascending order, sort a l ist of n a m e s i n to alphabet ical order. I will now look at a program that could be used to sort a list of 10 numbers into ascending order.

I should point out that the method 1 shall use is only one of many sort methods. It is a fairly simple method but not the most efficient. The choice of a sort method depends on the number of items to be sorted and the attributes of these items. Many commercial applications involve sorting very large numbers of items in which case efficiency becomes very important. The method I shall describe should suffice for the most simple appli-cations.

This method basically consists of working through the list com-paring pairs of adjacent items —

j if necessary swap the items so

that they are in the correct order

with respect to each other,

rem input data

repeat for each position in list

input item in list-position

end repeat repeat for each cycle

let swap count = 0

repeat for each pair

U pair in order fhen goto end

repeat pair

swap pair

add 1 to swap count

end repeat pair

i/ swap count = 0 then goto

print results

end repeat cycle

rem print results

repeat for each position in list

print item in list-position

end repeat This general program outl ine

can be expanded into the follow-

ing program. The best way to

understand the program is to

work through it us ing pencil a nd

paper with some samp le data .

NOW GET DOWN TO WORK . . .

10 IN REM SORT 10 N O S

ASCENDING ORDER

20 REM INPUT THE 10 NOS.

30 DIM A(10)

40 FOR 1=1 to 10

50 INPUT A(I)

60 NEXT I

70 REM SORT NOS.

80 FOR 1=1 TO 9

90 LET S =

100 FOR J =9 TO I STEP - I

110 IF A(J)(=A<J + 1)

120 REM SWAP A(J) AND

A(J + 1)

130 LET T =A(I)

140 LET A(J)=A(J + 1)

150 LET A(J + 1)=T

160 R E M A D D 1 T O

SWAP COUNT

170 LET S = S + 1

180 NEXT J

190 IF S=0 THEN 210

200 NEXT I

210 REM PRINT RESULTS

220 FOR 1=1 TO 10

230 RINT A(I);

240 NEXT I

250 END

In the worst case, al l cycles

would have to be performed

before the numbers were in

order. However, in many cases

the n umbe r s w i l l be sorted

before the last cycle. For this

reason, a count of the number of

swaps in any cycle is included. If

in any cycle there are no swaps,

then the numbers are in order

a nd there is no need to continue.

'DOWN TO BASIC

NEXT MONTH It is possible to have an array with more than one dimension. The commonest case being the two-dimensional array — a table of related data items. Next month, I wil l describe the use ol these two-dimensional arrays and I wil l also include an example showing the use ot string arrays.

The version of Basic summarised in the next issue wi l l be the Atari.

COMMODORE BASIC VARIABLES Names ol variables may be of any length and consist ol any combination ot letters and digits pro-vided they start with a letter — how ever, only the first two characters are significant.

If a variable name if followed by %, it is an integer numeric variable and wil l take only integer values.

Integer variables cannot be used as control variables in a FOR loop. STATEMENTS: Can have more than one statement per line using a " : " as a separator.

Numeric values wil l be converted from one type to another type when necessary e.g. if a real value is assigned to an integer variable, then the real value wil l be truncated to an integer.

The form of the IF statement is either of line no. ) IF (condit ion) THEN statements!) line no.) IF (condition) GOTO (line

no.) The ON statement can be used to

transfer to one of a list of line nos. depending upon the value of a given expression line no.) ON (expression) GOTO list of line nos.) line no.) on expression) GOSUB

— list ol line nos. ) CLR clears all variables and mem-

ory space. END terminates execution — can

appear at any point in the program. GET reads a character from a file or

the keyboard buffer.

NEXT it no variable, then it is matched with the most recent FOR statement.

POKE writes specified value at specified memory address.

SYS used to call an assembly lan-guage subroutine.

WAIT used to suspend program execution. FUNCTIONS: ASC returns the ASCII code ot the first character In the specified siring.

CHR$ converts code number to character.

FRE returns the amount ol tree memory space.

LEFTS returns the leftmost charac-ters of a string.

MID$ returns a specified substring of a string.

PEEK value of byte in specilied memory address in range 0 to 65535.

P0S returns the cursor position. RIGHTS returns the rightmost

characters of a string. SPC used in a PRINT statement to

supply spaces. STATUS returns status correspond

ing to last 1/0 operation. STR$ converts number to character string of digits.

TAN tangent. TIME read internal clock. USR calls the user's assembly lan-

guage subroutine. VAL treats the specilied string as an

arithmetic expression. Plus ABS, ATN, COS, EXP. INT,

LEN. LOG, RND, SGN. SIN, SDR, TAB. GRAPHICS: Screen has 25 rows and 40 columns.

Special graphics characters.

r

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PACKAGE SYSTEMS NET VM TOTAL Apple Executive System 1950 00 292 SO 2242.50 Apple top Secretary System 2 ISO 00 322 00 2472 50 Apple education System 1425 00 213 75 1638.75 APPLE HARDWARE Apple 48K Video Output omy 62S00 93 75 71B.75 I6K Addon 4SO0 6 75 S1.7S Disk Drive with Controller (16 sec) 34500 51 75 396.75 Disk Dr ivr without Controller 275 00 41 25 316.25 ACCESSORIES TV MexMator 1400 2 10 • 6.10

INTERFACE CARDS Prototype/Hobby Card 1200 1 B0 13 80 p^rauet Printer Card 79 00 1 1 85 90.85 Communications Card too 00 1500 115.00 High Speed Serial Card 9000 13 50 103.50 Centronics Card (00 00 1500 1 15 00 Integer Card 90 00 13 50 103.50 LanguageCard 95 00 14 25 109 25 Controller C v d 95 00 1425 109.25 Eu'occnour Card 65 00 9 75 74.75 IEEE-48 Card 200 00 30 00 230.00 IbK RAM Card |48K to64K) 60 00 9 0 0 69.00

SOFTWARE Apple Post Program 27 00 4 05 31.05 A p p * Writer 11 34 00 5 10 39.10 Stella' invader 1300 t 95 14.95 Apple Plot 34 00 5 10 39.10 Apple Adventure 1900 2B5 21.85 APPLE DISTRIBUTED SOFTWARE Micro Modeller 375 00 56 25 431.25 Vise ale 3 3 105 00 15 75 120.75 VistFiie 13500 2025 155.25 VisiPiiex 95 00 1425 109.25 VisiTrend/VrsiPiiot I3SOO 20 25 155.25 ViSiTerm 80 00 >200 92.00 VisiDex 105 00 15 75 120.75 Desktop Plan B 105 00 IS 75 120 7S

LANGUAGES Pascal Language System 22S00 33 7S 258.75 Apple Pilot 7500 11 25 86.25 Apple Fortran 95 00 14 25 109.25 CIS Cotjoi with Forms -2 41000 61 50 471.50 PRINTER & ACCESSORIES Siienrype Printer 170 00 25 50 195.50 10 Rolls Thermal Paper 28 00 4 20 32.20 10 Blank Disks SS/SD 1700 2 55 19.55 VIDEOMONITORS BMC 12" Green Screen 120 00 1800 138.00 9" Black & White Monitor 100 00 1500 115.00 Cables 500 0 75 5 75

OTHER ITEMS ZBOSoftcard INTEGRATED ACCOUNTING PACKAGES SYSTEMATICS Safes Ledger General Ledger Purchase Ledger Stock Control Payroll Invoicing Financial Planning ATARI 400 16K Computer 900 16K Computer 410 Tape Recorder BIODisk Drive 822 Thermal Printer 825 80 Column Printer 850 RS 232 Interface I6K Ram Upgrade Conversational French Conversational German Conversational Spanish Conversational Italian Assembler Editor Rom VisicaK Word Processor Pilot Star Raiders Missile Command Computer Chess Super Breakout Basket Bail Space invaders Mus»c Composer V i d e o Compute r System NEW - N . E . C . PC 6000 SERIES PC 9001 Keyboard PC 8011 Expansion Unit PC 8012 IKJUnrt PC 9023 Dot Mai rut Printer PC 8031 Floppy Disc Drive PC 8041 12" Green or Amber Monitor PC 9043 12 High Resolution CRT

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CONDITIONS OF BUSINESS. We accept cheques or Access. Barclaycard. American Express and Diners Club Cards All prices, specifications and terms are subject to change without notice at the discretion of the management All offers subject to availability Puces correct at time of gcxng to press E & O E

NET V A T T O T A L 170 00 25 50 195.50

150 00 2250 172.50 150 00 22 50 172.SO 150 00 22 50 172.50 150 00 22 50 172.SO 150 00 22 50 172.SO 150 00 22 50 172.SO 150 00 22 50 172.50

250 00 37 50 287.SO 500 00 75 00 S7S.00

42 61 6 39 49.00 260 00 39 00 299.00 200 00 30 00 230.00 400 00 60 00 460.00 11000 16 50 126.50 52 13 7 82 S9.9S 28 26 4 24 12.50 28 26 4 24 37.50 28 26 4 24 32. SO 28 26 4 24 32.50 30 39 4 56 34.95

105 00 15 75 120.75 78 22 I I 73 89.9 S 60 83 9 12 69.9 S 21 73 3 26 24.99 20 86 3 13 23.99 1909 286 21.95 1909 286 21.95 1909 2 86 21.95 24 30 3 65 27.95 26 04 3 91 29.95

69.56 10.43 79.99

50000 75 00 575.00 407 83 61 17 469.OO 346 96 52 04 399.00 326 06 48 91 375.00 543 4fl 81 52 625.OO 129 57 19 43 149.00

477 39 71 61 S49.00

Hardware Post and packaging * subject to confirmation 1 3

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guj'.wueeiJ one year from dMr ol r n j ' f w f l q ^ i s t drTftts m jtrn) tvorkovmr»p

D„r >rxj me gu* .tntf e period wetrorctf nv<» or replace * np r i " ,»(compr^enss fhjf prov^ drlprlivr - provm*>9 fxai t«e codiXt >i returned oi postage prepaid

wnen bougnr and proof or purr rvrne

rn.\ rto*\ not appry •> !"e op"i">n nl tnr C nmpany rne product rvs f>pfn o,»m.«3pa oy •nortmt rmsuseor nwsapp*c*ion

HOW TO ORDER • State disk type and w e • A<JdiS VAT • Inc tude f i per Software item for Postage

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• H wii •: . - v : K I "wrr u 79 COMPUTER 8t VIDEO GAMES

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[TANDY V. GENIE ' Computer challenges you at Monopoly as a

player For up to 6 players ( including computer) Unique system featured ' whereby computer detects the skill of best player then ediusts its skill automatical ly to match thai plevei Computer 's game at highest level i t strong' Every game different, close, excit ing and chal-lenging Game data can be saved on tape to continue game at another t ime Easy fool proof entry i<je«l even tor chi ldren to use 2 versions of Monopo ly included 'Standard1 — as t o rules "Popular' — alight variat ion to rules. Many, many hours Ot tun tor all the family

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i A GAMES PLAYERS GUIDE TO THE VIC-20

EXPANDING MEMORY The VIC-20 comes with 3.5K of usable memory and serious users will soon have to start thinking of expanding.

There is quite a choice about how you increase your VIC's memory- Commodore produces a memory expansion board which plugs on to the back of the machine and allows the user to stick in extra memory cartridges.

The Commodore cartridges presently available offer an extra 3K, 8K and 16K of RAM - £29.95, £44.95, £74.95 respectively. The memory board connects to the VIC expansion port, and has six ports to allow the user to have all three memory car-tridges, plus programming aid cartridges plugged in at once, it costs £125.95.

Stack has a wide range of memory expansion kits using a piggy-back tech-nique. 3K costs £25; 8K, £82 and £69; 16K, £124 and £99; 24K £167 or £129.

Stack also offers a special memory board which allows the user to protect 16K of memory so that programs can be kept in while the machine is switched off. A bat-tery keeps the programs in memory for up to a year and with 19K of memory it costs £198

Stack Computer Services is at 290/298 Derby Road. Bootle. Liverpool 20, Mersey-side.

Arfon Micro has a VIC expansion system which allows up to seven cartridges to be added on to the machine. The memory expansion board costs £85 and the firm also produces three memory cartridges. 3K costs £26.04, 8K, £39.09 and I6K £65.17 (all plus VAT|.

Arfon Microelectronics can be found at Cibyn Industr ia l Estate, Caernarfon, Gwynedd, North Wales.

Beelmes gives the user a chance to expand his VIC up to 35K and have a 40 column by 24 row layout compatible with the viewdata standard. This expansion unit costs £253. Beelines is at 124, Newport Street. Bolton, BL3 6AB

CHARACTER DEFECTS The main criticism of the VIC is the lack of character space it allows on the screen.

The screen layout is 23 lines deep and 22 characters long. As a result the text seems too clumsy to be pleasant to read and only short areas of a program can be listed on screen at any time. Each character is formed by an 8 x 8 bit matrix, so in high resolution mode there is a possible 176 x 184 points to play with.

Up to 16 colours can be generated by the machine. Each character and the screen border can be one of eight different colours

The prospeel of a low-cost colour compu-ter supported by a company ol Commo-dore's pedigree was the rich promise offered to the personal computer public last summer.

The promise was some l ime being fulfil-led as a large backlog of orders built-up while the bulk shipping ol computers from the German lactones was delayed. Bui the personal computer user Is used to Irustra lions of this sort and watted patiently. Now the VIC is rewarding thai patience with a quickly growing range ol games and game peripherals and a sales figure ol 15,000 a month.

For your £199.99 (after VATi you wil l receive the VIC computer complete with a QWERTY keyboard, a lead to plug into a home T.V. and a power supply lead. It comes complete with 3.5K ol usable memory.

The VIC s bright colours and graphics are welt suited to gaming and a do/en firms are producing games software lor the machine. The peripherals come from just a lew lirms but there is already a wide range. Names and addresses are laid out below — II an address is missing it wi l l be included elsewhere.

Commodore is based at 675, Ajax Avenue, Slough Trading Estate, Slough, Berks. SL1 4BG

and the background, one of 16 possible colours.

Sound wise the VIC is equipped with four voices, alto, tenor, soprano and white noise. It also offers 8 volume control which ranges from 0 to a very loud 15.

Copying arcade games is usually a good test of a computer's sound and graphic facilities and the VIC produces some very faithful copies. The range of graphics characters provided by the VIC can be supplemented by defining your own graph-ics made up of 8 x 8 pixels.

Commodore produces a super expander hi-res cartridge to help improve the graph-

Botanist. T.V. presenter and larger than lile character, David Bellamy gets to grips with some ol the VIC-20 s larger than lite characters on his T.V. screen.

C O M P U T I C S M I C R O S O F T

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iA GAMES PLAYERS GUIDE TO THE VIC 20i ics capabilities and it costs £34.95. It includes commands like: paint, colour, draw, circle and sound.

SOFTWARE SUPPLY Software for the VIC is growing in supply to meet demand.

At least 10 software firms are turning to VIC-20 production, some of which began in the business by supporting the Pet so many of the programs first on sale for the VtC are conversions.

Mr Micro of Manchester is an example of this type of firm It started with Pet programs but now has moved on to VIC games. Over 40 programs are listed in his catalogue including Gold Rush which is a similar idea to the recently solved puzzle, posed in the book Masquerade• The object is to win a real nugget of gold by solving the game, the nugget going to the first person to do so Another is a game entitled the Great Ballon Race

Mr Micro can be reached at P0 Box 24 Swinton M27 3AL.

Bug Byte is another major supplier hav-ing moved on from the Sinclair ZX81 and the Acorn Atom, on its lists at the moment are Vicmen. which is a version of Pacman, Vicgammon (backgammon), and a version of breakout called Another Vic in the Wall.

0 K'tronics is in the process of building up its VIC-20 software library. Currently with Rox and Oeflex on the books and one cassette with ten programmes. They cost £4 95 each and £6.95 for the multi program pack. An 8K hi-resolution Rox will soon be available for £4.95.

Some 17 programs are on the catalogue from Audiogenic including well-known games like Alien in which you have to trap foreign beasts and bury them in holes in the ground. That costs £7.99 for the pleas-ure. Also on the list is Star Wars the game based on the adventures of film screen hero Luke Skywalker. It costs £6.99.

Audiogenic imports games software from the American firm Creative Software who supplies VIC programs. The firm can be reached through PO Box 34-36, Crown Street, Reading, Berkshire

Liverpool based Supersoft is just begin-ning to branch into VIC software after having been one of the leading Pet soft-ware suppliers. First off the production line ts an eerie game called Nightmare Park which should sell for £4.99. And a war-based game Tank Battle is shortly to be available but has not got a fixed price yet.

For further details wri te to Supersoft at 1st Floor, 10-14 Canning Road, Wealdstone, Harrow, Middlesex.

Smaller firms providing a more limited range of software are as follows: Anglo American Software, 138a Stratford Road. Sparkhill, Birmingham, B11 1AG; Big Softie, 5, Ashton Park, Belfast, BT10 OJQ; Bridge Software, 36 Fernwood, Marple Bridge,

Stockport, Cheshire; G Moore, 4, Ackers Road, Woodchurch, Birkenhead, Mersey-side; Gibson & Harvey Enterprises, 49 St Leonards Road, Bexhill on Sea, East Sus-sex; Hi-Tech, 7 Queensway, Hemel Hemp-stead, Hertfordshire.

Thorn EMI is also in the process of developing software for the VIC-20.

Commodore itself is supporting the VIC with a range of ROM cartridges and also has a very addictive cassette game called Blitz. It costs £4.99

JOY OF STICKS Any gamer who has struggled with four directional keys while trying to keep half his mind focussed on the " f i re" button knows who put the " joy" in front ot "st ick".

The VIC-20 currently has two joysticks available The Commodore version costs £7.50 and includes a fire button.

Stack Computer Services includes joy-sticks in its large range of VIC peripherals. These retail at £13 each.

Commodore also offers a pair of paddles for £11.74 (plus VAT).

Stack supplies a light pen for the machine which works in both normal and hi-res modes, allowing interaction with the screen without using the keyboard, it costs £25.

Like the Pet the VIC-20 uses a specially made Commodore cassette recorder to load programs. It interfaces directly to the computer and includes a tape counter. The recorder uses standard cassettes and costs £44.95 (after VAT).

A single drive floppy disc unit for the VIC is available from Commodore. It has 174,848 bytes storage capacity and uses standard 5J" single density floppy discs and costs £396 (after VAT).

The Vic printer's features include: 80 characters per line, a 30 character per second print speed, and double size graph-ics. It is a dot matrix printer and costs £230 (after VAT).

Stack produces a VIC-RS232 interface which will allow the computer to be con-nected to mainframe computers and act as a terminal or drive a daisywheel printer. It costs £49. A low-cost version of a bi-directional RS232 interface costs £17.25 and is also available from Stack.

Commodore's RS232C terminal type interface provides the opportunity to con-nect to telecommunications controllers and other computers it costs £34.95. Daisy-wheel printers can be interfaced to the computer via the Commodore IEEE488 car-tridge for £54.50

Among Stack's other offerings are: a VIC games port cable adaptor which gives you two games port for joysticks and light pens; £17.25; a games port multiplexer needed for two |oystick games, £33; and a VIC toolkit which includes hi-res graphics facilities and renumber and auto number features and costs £25 wi th a manual

ZX80 — ZX 81 HARDWARE

Tape recorder interface unit Designed lo help those with LOADING difficulties Self contained at £12.5(1 inc. Video amp unii to allow /,\K0 8I to drive standard video monitor. Much bel-ter pictures than on the I. V.'v Self con-tained at £12.511 inc. SAE f&t detail* I). BRICK H.ECTRONICS I Ml BKACOV BLACK HA LI . ROC KS t ' t . F V H %ND TS27 <IBH TKL. 07KJ H6V>12

VIC 20 GAMES TAPES Tape 1. Six super games all w i th great graphics, colour and sound Four try a Row. Mean Maze, Pontoon. Bustabnck, Higher or Lower. Fruit Machine Price £3 <ncl. P&P Tape 2. Golt and Polaris Three, Advanced games Price C2 SO met P&P All run on standard machine Send now to M GARDINER, 103, Holmps Chapel Road Congleton, Cheshire.

VIC VALUE NO I 4 great games on one cassene for the basic Vic 20. Complete wi th guide No. 1. HELICOPTER — can you land a helicopter at sea? No. 2. VIC HUNTER — Can you rid the Vic jungle of strange creatures? No. 3 DRAGON — feed the dragon before he feeds on you. Excellent graphics. No. 4 ALIEN PLOT — you are at the controls of a strange alien craft Will you land it safely? For the above at introductory prtce of £7.95 inc. wri te to MR MICRO LTD, PO Box 24, SWINTON MANCHESTER M27 3AL.

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Catacombs . . , A Graphics Adventure.

GAMESTAPE 4. for 16K. only £5.95 30 Monster Ma;e . . . Unbelievable

Graphics. Cheque/P.O.s to

J.K. GREYE SOFTWARE, Dept CVG. 16 PARK ST.. BATH, AVON BA1 2TE

GOLD RUSH NEWS You could stilt be the one to f ind over £250 in your3.5k Vic. Tape & prospect-ing guide €16.00 Inc.

BALLOON RACE NEWS Highest scores reached to date: 196 By R Browne of W. Midlands and P A Brain of Middx. Join the balloon race. Every entrant has 3 chances to w in for £16.00. Runs in 3.5k Vic. Both the above games are available from MR MICRO LTD. PO Box 24, SWINTON MANCHESTER M27 3AL.

H

R

AMERICAN-FOOTBALL Excellent arcade game w. ih great graphic* and round Past ball and score goal* lor points but watch out lor the other team's players High Score (4 00 ACROBAT — burst bal loon* wi th f lying man With graphics, sound and High Score f 3 00 Or Both for CO 75. Supplied on quality caster tee Cheques payable to

EXCALIBUR Software 6 Grange Avenue Shiremoor TyneWeai NE77 0: £

r . -ADULT. -

• • ONLY J 1

| V I D E O C L U B ! |

. Ring: 0373: I <Hi or rv fMrwj i lchejp ia tn

I 830563 I or send coupon to:

I VIDEO CLUB

I D R E W S T E A D R D . J ' L O N D O N S . W . I 6 I Please send FREE detai ls. I a m over 18 I

NAME

ADDRESS

I PHONE I I r rm fmb f i fr» fiH in you* t f t* phone riumt**

ifl GAMES PLAYERS GUIDE TO THE VIC-20<

FOR AND AGAINST The VIC-20 has various bad points for the user. Other than the obvious 22 column problem there is a distinct lack of expan-sion sockets, any expansion being forced outside the computer. This implies buying expansive motherboards that aren't really performing any expansion themselves.

There are a few software nuisances such as input prompts being limited to 22 characters and extra scrolls when writing at the bottom of the screen.

The cassette storage system could be better. Load and verify errors are not log-ged until the end of a file and the data rate is no faster than normal audio techniques — the special system used by Commodore coufd be a lot faster without increasing errors.

In its defence, the VIC has good Basic, super graphics and is of good mechanical construction. The package seems excellent value for money being compatible with the Pet and having oodles of add-on peripher-als.

The after sale support is alright consider-ing that add-ons, software and literature are not really around yet. 1 had the misfor-tune to be caught up in the power unit recall by Commodore and their approach and speed in this matter could not be faulted.

All in all. an excellent machine and well worth its purchase.

PLUG-IN GAMES One of the VIC-20's great gaming advan-tages over other computers is its plug-in cartridges.

Commodore is supporting the computer with a range of games programs recorded on cartridge which plug into the back of the machine and include enough extra memory for the unexpanded VIC to recreate popular arcade games.

These sell for £17,35 {plus VAT) and the range is expanding quickly. It includes a marvellously accurate copy of arcade space invaders (complete with 21-14 flying sauc-ers) which sells under the name VIC Avenger And just released a Packman game called Jelly Monsters which com-pares well with the arcade original.

Galaxians is to be found in this form as Star Battle and my own favourite is a Rally X variant called Rat Race. Also out are Alien, Road Race, Super Lander and Super Slot.

Oue out soon in cartridge are a series of five Scott Adams Adventures, including: Adventure and Mission Impossible and an exciting and imaginative Pinball game

Commodore has taken its time to bring these gtmes out but it is aiming for a high quality rather than quantity and in the case

of Avenger, Rat Race Jelly Monsters and Star Battle has succeeded in this aim

Arfon Micro hopes to have a range of cartridges available for the VIC ready by this summer. Similar to the Commodore games cartridges and costing around £30. the Welsh firm has plans for a dozen games in i t ia l ly , inc luding space invaders, Richochet and City Bomber

WRITTEN WORDS The time to write books on the VIC has been short but there is already a selection on sale rushed out to meet demand.

Getting Acquainted With Your VIC-20 is by Tim Hartnell, author of a book going by the same name for the ZX81. It costs £595 and is obtainable from Kuma Computers, I I York Road, Maidenhead, Berkshire.

The VIC Revealed by Nick Hampshire is said by some buyers not to live up to its name, causing them confusion. It is pub-lished by Nick Hampshire Publications at PO Box, 13, Lysander Road, Yeovil, Somer-set and costs £10.00.

Touching on machine code for those users interested in the subiect is a book called Assembly Language for VIC-20 by Dr P. Holmes, price £10.00 Copies can be obtained from the author by writing to 21 Colin Drive. London NW9 6ES This 200 page book contains a 6502A instruction set, programs, exercises and an assembler list-ing.

At the beginner's end of programming try Start With Basic on the Commodore VIC-20 which costs £4.95 Written by Don Munro and illustrated by Bill Tidy it is available from Tiny Publishing, 25, Beech Hill, Haywards Heath, Sussex.

Sigma Technical Press is planning to get in on the act and is in the process of compiling a book about the VIC-20 but precise details are not yet available.

Commodore publishes several books oi the machine, including: Learn Compute Programming wi th the Commodore Vic b L Carter and E. Huzan which costs £1.95 the VIC-20 Programmer's Reference Guid is by A. Finkel, N. Harris, P. Higginbottor and M. Tomczyk. It costs £14 95

Commodore also produces books wit demonstration cassettes to help users ge the most out of the computer. Introductio to Basic (part 1} costs £14.95 and th Programmer's Aid Cartridge gives 20 extr command words to help make the pn grammar's life easier. 11 includes advice c using the function keys and includes AUTI TRACE. RENUMBER and MERGE cor mands. It costs £34 95.

A Machine Code Monitor cartridge ar book helps the user get to grips with 651 assembly language. It has assembl' disassembly, hex dump, relocate, brea point and transfer among its features ar costs £34.95.

ADVENTURE: A type of game in which the player has to take a character role and retrieve a number of treasures or objects by a trial and error process giving instructions to the computer. The player encounters a variety of hazards often taking the form of dangerous monsters, wizards and ani-mals Some Adventure games are so complex that they take weeks or months to solve. Adventure games were originally written for massive mainframe computers. ARRAY: A series of items — data or information — arranged to form a meaningful pattern. BASIC The most widespread compu-ter language which is one of the easiest to learn and is used on all microcomputers. BUG: A slang term given to a mistake in a computer program which prevents it from working. It can refer to a mechanical, electrical or electronic fault. CHIP: A tiny piece of silicon which holds all the components which make up a microprocessor. COMPUTER PROGRAM: A specified set of instructions which perform an operation or task for the computer user COMPUTER LANGUAGE: A language is used when writing programs and is vital for making the computer perform operations. A language consists of computer instructions or commands. There are different types of languages for carrying out different tasks. CONCATENATION: To unite in a series, to form a link or a chain. HARDWARE: The general term given to all pieces of electronic and mechanical devices which make up a computer system, i.e. the actual machines. HIGH RESOLUTION GRAPHICS: Graph-ics which can be reproduced in great detail or to a high degree of accuracy. KILOBYTE: A measurement of memory capacity. 1024 bytes of memory, so 8K is equivalent to 8192 bytes. LOOP A Basic function referring to the repeated execution of a series of instructions for a fixed number of times MACHINE CODE: The term used to refer to symbols or numbers assigned to parts of a machine. It is the same as operation code which is the symbol

telling the computer which operation to perform. When a game is written in machine — sometimes known as assembly language — it speeds up the action. MAINFRAME COMPUTER: The jargon word used to describe a very large computer capable of storing a vast amount of information in its memory banks. MICROCOMPUTER: A tiny computer consisting of hardware and software. The main processing blocks are made of semiconductor integrated circuits. MINICOMPUTER: A small computer system which gives higher perfor-mance than a microcomputer, costs more, has richer instruction sets and a proliferation of high level languages and operating systems. OPERATING SYSTEM: Firstly, this can be used to describe an organised col-lection of techniques and procedures for operating a computer. Secondly, it refers to a part of a software package — the program or routine — defined to simplify procedures including input/ output and data conversion routines. PERIPHERALS: Equipment which is used with a computer system, e.g. printers, disc drives, and VDUs. PSEUDOCODE: Computer instructions written in a symbolic language by the programmer which must be translated into machine language. RAM (Random Access Memory): This is a memory chip which you can load programs and data to and from. ROM (Read Only Memory): A memory chip which can only be read from but not written into after the initial data has been input. ROUTINE: A set of coded computer instructions used for a particular func-tion in a program. SOFTWARE: Another name for compu-ter programs. It can also refer to com-puter documentation. STRUCTURED PROGRAMMING: A set of techniques designed to increase the reliability and comprehensibility of programming by making the program-mer more disciplined. SUBROUTINE: A computer program routine that is translated separately. VDU (Visual Display Unit): A monitor, tike a television, which is connected to a computer and is used to display information from the system's memory.

I r e a d e r s UIC20 VIC INVADERS <n m j c h m e code lor sp«i»l

Ful l co lour . B s o u n d effects No ext ra R A M needed Cassette a n d inst ruct ions . . f 6 90

ZXS1 Invaders lk Games

2X11 INVADERS IN MACHINE CODE FOR SPEED 20 Invaders in 4 l o w s o l f i ve M m 4k RAM needed C.issettf> and ins t ruc t ion* t'Vj 00

IK G A M E S <S g a m e * I cassette and ins t ruc t ions Q 00

1 6 k RAM P a c k i nc lud ing FREE /.X81 Invaders cessetto

• • M k RAM avai lable soon • • Send s a.e (or detai ls, descr ib ing your sys tem Prices inc lude post and packing in Br i t ish is>es

BR LOG E SOFTWARE <G) 36 FERNWOOO. MARPLE BRIDGE Ma i l Order on ly STOCKPORT. CHESHIRE SKS 5BE

DATABASE for VIC 20 Standard Machine, Custom Security, Pass Word, 30 Addresses, Search. Look. £5.95 Games 1 £4.95; 2 = £7.95; 3 = £9.95. SAE for list.

CASS CONCERNS LTD Maxet House, Liverpool Road, Luton LU1 IRS.

DO YOU PLAY TV GAMES?

I t c o u l d c o s t a n y t h i n g u p t o £ 1 0 0 0 t o o w n y o u r o w n c o m p r e h e n s i v e l i b r a r y o f c a r -t r i d g e s l o r y o u r T V g a m e s c o n s o l e . W e h a v e s u c h a c o m p r e h e n s i v e l i b r a r y ( o r m o s t s y s t e m s , a n d a r e p r e p a r e d l o o f f e r i h i s f a c i l i t y l o y o u a t l o w d a i l y r e n t a l s , w i t h t h e o p t i o n o f p u r c h a s i n g at S p e c i a l D i s c o u n t P r i c e s t h o s e c a r t r i d g e s w h i c h g i v e y o u m o s t p l e a s u r e . F o r f u r t h e r d e t a i l s p l e a s e s e n d a l a r g e S A E t o E & E E N T E R P R I S E S . P 0 B O X 8 . S A L T A S H . C O R N W A L L P L 1 2 6 Y U

HAVE YOU SEEN MR MICRO'S CATALOGUE? IT CONTAINS OVER 40 PROGRAMS FOR THE VIC 20. For your copy send a 9 x 4 SAE to MR MICRO LTD, PO Box 24, SWINTON MANCHESTER M27 3AL.

AD INDEX

Acorn 70 Adds W Addictive Games 40 Algety 12 Anglo American Software Co

».S7 Audio Computers 2 Audio Video Often •*> Avon Computer Rentals H

Bug Byte Buttock Computers Broadside Associates

Ceksto

70 » n

» J 4

Caps Ltd" ~ * CemeH Soltwire tS Chromasontc Electronics 6

Cambndoe teeming I Ud

Commodore Vic Compshop Computer Centre Control Technology Croydon Micros

D«U Asselte DK'Iromcs

Electronequip Esseniel Software Co Everyman Computers FuSei Microsystems

Gale Set Gemtnt Electronic*

Henry's Radio Hewson Consultants Moldco

72 B «

40 II 46

K 11 H

n » v>

to 19 40 70 17

Ibek Systems 17 Jennings 11 Keyde Electronics n LeiSuiDmci 61 Lowe Electronics » Maeronics 56 Mephfv OBC Me mon th » Metrotech 71 Micro & Video Palace 71 Miciodeal 67 Microtarnc Software 41 Mokmerx t t

Onytn 46 Personal Computer Palace 4J Plessis Electronics 61 Program Power 14 Prolos Computers 11 Qmcksilv* 31

HEW Video Product! 4 S*ca Shop 16 Srfveiioh n SHS Microsystems u Srfversott 76 SRS Microsystems 1? Superior Systems » TethnometK 1 Texas Instruments 74.74 Twickenham Computer

Centre 85 Video Services Bromley 71

r

If you're looking for a home computer, you'll already know that the VIC does it all. To help you get started. we have put together this attractive cost-saving package

VIC-20 computer

Cassette Deck Blank Cassettes

^Introduction to Basic Part i

m User Manual

+ ;12 months warranty % Fitted 13 amp plug

Dot Matrix Printer Memory Expansion Board • Plug-in Memory Expansion j . . Q n Multi-slot unit used to

c E ^ r c u r L at 10 a C C e p t m e m 0 r y a n d / o r cnarac ers per line at 30 g a m e a n d p r o g r a m

cartridges £85.00 plus VAT

characters/seconds £199.96 plus VAT

Cartridges 3k-£26.04, 8k- £39.09,

16k-£65.17 plus VAT Single Drive Floppy Disk Unit

£395.00 plus VAT The standard features of the Vic are: * 5K RAM expandable to 32K • 16 screen colours * 8 character colours * 3 tone generators, each of 3 octaves - plus white noise generator • Screen display 22 charactersx 23 lines deep * Full PET type graphics * High resolution graphics capability • 8 programmable special functions

Goods required

Add £4 00 post packing am) insurance !<y special deal arid f1 00 post pacing .no insurance loi i l l otto* items Aod !S*»lo all prices tor VAT

Name

Address

fwrvbjc ouestootcii

Price

ToWf

-CX

MAILORDER to AddJ Home Computers Ltd fRffPOST London W3 68fl 01 telephone your order (24 hours d day 110 01 -992 9904 Quotng your Visa Access or American E«press number "I enclose i cfteque made payabte lo Adda Home Computers Limited tar C ' Please charge my Vrs*/Access>'American twess account Myacoum number is ' Ptease add o»y name to your mailing lot "Detele as applicable

Dale SHOPAOOWSS Adda Horni Computers Ltd 154 Victoria Road. Acton London W3 (nut North Acton ti'be sutoni Tel 01-992 9904 OPEN t0am-6pm I Tuesday-FrnUy). tOanv 5pm iSaiurdayi

» tuoasv iv « ofci'Jaie"-n. mv* AMI ntnfj'iMnif « I j t t cp" >a

<3 conditions oi saw fun details ava> aM on rnuest but j-ranty Please allow 3\ days lor Oakvery Allow > days to>

From West London's mail order specialists: Latest special offers: 48K Apple £768 12in Green monitor £115 12in Amber Phillips monitor £135 Epson printer £399

ALL PRICES INCLUDE VAT

TWICKENHAM COMPUTER CENTRE LTD U Hutu M TvkkHkim M M i TWI4BWI0I-89Z 7896/01-89116121

COLOUR ATOMS

Colour A tom (ATM3) £197.80

Acorn Atom ass. 5Kram 8Krom + new PAL Colour Encoder, 1.8A power supply and 4 free

Acornsoft cassettes

New Colour Encoder (ATM25) £43.70 Acornsoft cassettes £10.81 BBC21 Upgrade Model A to B £115.00

Prices inc. of VA T and Postage All items in stock — quick delivery.

ELECTRONEQUIP 128 W e s t S t r e e t ,

P o r t c h e s t e r , H a n t s P 0 1 6 9XE . Te l : 0705 325354

si Wi%:L . / m *

• - ' ^ m - ' . \

CAkNIll 10>T«H M

ZX81 A D V E N T U R E SPECIALISTS C2: VOLCANIC DUNGEON HANGMAN £4 50 A) VOLCANIC DUNGEON Rescue >1 you can. the Elfin Princess Mythical

monsters, pits, f iery caverns, d iminishing strength end Mater make your quest anything but easy F U U 16K PROGRAM * • SAVE GAME ROUTINE • * SINGLE KEY ENTHY "Volcanic Dungeon is terri f ic value end I wou ld recommend it to anyone

Mrs Thomas. Cornwal l Bi HANGMAN Oelu* version of the classic game Play against an opponent, or

the computer 's 400 word vocabulary Good graphics

C3: A L I E N INTRUDER HIEROGLYPHICS £5 00 A) ALIEN INTRUDER: You awaken to f ind you are the only Survivor on the

Explorer Class 3 Star ship Can you escape before you also fall vict im to the Alien monstrosi ty that devoured the crew? There are many ways to and this adventure but only one way to survive! FULL 16K PROGRAM * • INTERACTIVE GRAPHICS * * SAVE GAME ROUTINE • '

Bl HIEROGLYPHICS: Decode the ancient 39 symbol alphabet m t ime to save the famous explorer Wu l l i e Makei t " f rom a sandy grave FULL 16K PROGRAM • • ANIMATED GRAPHIC DISPL CODE• *

PLAY RANDOM

C4: W U M P U S A D V E N T U R E M O V I E M O G U L £5 00

Ai WUMPUS ADVENTURl FOR 1 TO 4 PLAYERS!: Seek the famous creature in the most dangerous Wumpus hunt ever. Al l the usual features are there SUPER BATS " PITS " TREMORS • • SWAMPS " MAGIC ARROWS " * PLUS Excit ing new features EVIL GOeilNS that wi l l i ry to sacrifice you to the Wumpus GIANT SERPENTS " WUMPUS MUCK " MAGlC SPRINGS FULL 16* PROGRAM • * RANDOM & PRESET CAVE PATTERNS • * YOU CONTROL THE LEVEL OF DIFFICULTY • • GREAT FUN FOR YOU AND YOUR FRIENDS • •

0) MOVIE MOGUL Guide your f i lm through the often hilarious traumas of product ion Use your budget wisely and you may make a fortune Success depends on many factors and not just luck. FULL t6K PROGRAM • * •

ORDERS: Plus 50p P&P or large S.A.E for list to: CARNELL S O F T W A R E

4 Staunton Road, Slough. Barfcs SL2 I N T The above are also available from BUFFER MlCROSHOP. STREATHAM

LONDON

SPECIAL OFFERS Prices include VAT

NEW SHARP MZ-80A Personal computer. 48K Green screen, free software + dust cover. £549.00

VIC 20 Colour computer and cassette player. £244.94. Free introduction to Basic worth £14.95 + Free dust cover.

GENIE I £10 off — only £333.00. Free soft-ware and dust cover.

DAI 48K colour computer. Free cassette player. Free software and dust cover. £688.00. •

Name: .

Address:

I | AccessBarclaycard No.

I r very man Uomputers 14 Edward Street. Westbury, Wilts j

Tel.: 0373 864644/823764 Phone for Credit details


- AUTOMATIC -TAPE CONTROL

The logical extension for „ the Sinclair ZX8I giving data retrieval & word processing

The ZX99 Tape Control system is a sophisticated extension to the Sinclair ZX81 Microcomputer, providing remarkable additional capabilities, which allow both the beginner and expert access to a professional computing system wi thout the expected expense.

+ DATA PROCESSING The ZX99 gives you ful l software control of up to four tape decks (two for loading and two for saving) allowing 'mixing' of data files to update and modi fy them. This is achieved by using the remote sockets of the tape decks to control their motors as commanded by a program.

* PRINTER INTERFACE The ZX99 has a RS232C interface allowing you direct connection with any such serial printer using the industry standard ASC11 character code (you can now print on plain paper in upper and lower case and up to 132 characters per line.)

* M A N Y SPECIAL FEATURES There are so many different features that i t is d i f f icu l t to list them all: For example: AUTOMATIC TAPE TO TAPE COPY: You can copy any data file regardless of your memory capacity (a C90 has approx 200K bytes on it) as i t is loaded through the Sinclair block by block. TAPE BLOCK SKIP wi thout destroying the contents of memory. DIAGNOSTIC INFORMATION to assist in achieving the best recording settings.

The ZX99 contains its own 2K ROM which acts as an extension to the firmware already resident in your ZX81'S own ROM. The ZX99's ROM contains the tape operating system, whose functions are accessed via Basic USR funct ion calls. Each function has an entry address which must lie quoted after the USR keyword. Al l of the functions can be used in program statements, or in immediate commands (i.e. both statements wi th line numbers and commands wi thout them).

COMPREHENSIVE USER M A N U A L INCLUDED

EXTENSION BOARD FOR NORMAL

SINCLAIR ACCESSORIES

• HIIWIIIIIIIIII HIIWIIIIIIIIII

REAR

BUSINESS, EDUCATION Er FUN

1 ZX99

r . * - B s j l -• - H IL!

E312 TAPE DRIVE

(ALL REQUIRED FEATURES!

PRICE

COMPUTER CASSETTES QTY PRICE TOTAL tTEM QTY PRICE P&P TOTAL

C5 3Sp ZX99 Automolk Tope Control ler + Super Software

•

£

5995

£

295 CIO 37p

ZX99 Automolk Tope Control ler + Super Software

•

£

5995

£

295

C12 38p E3I2 Cassette Tape Drive 24 0 0 L 0 0

CI5 39p Cheque/PO poyobl e to Storkrose Ltd. C20 41p or

e to Storkrose Ltd.

C25 43p • ' l -harge my Acteiv Vt io cord no

C30 44p

CIS Leade' le i i £1 00 sir,wen

Add mm £1 50 or I 0 % P A P [ sir,wen

ORDER FORM TO

data-a//ettei Dept CVGI 4 4 Shrolon Street. London NW16UG Tel 01 258 0409 telephone enqumei welcome

NAME

ADDRESS.


THE NAUGHTY ONE An adventure lor (vary) broadmmded people Pay your way through gambling dens, bars and house* o l vice, be secluded or seduced eern a Have acquire pan o l your opponents bodies Loose your money and borrow (ha there i t rw ba r * only a pawnbroker whose sole coteterel w i be some o l your clothes) Gamble for the clothes o l your opponents, force the pawnbroker to euction some clothes (preferably from other players ..I. be given some saucy tesks or dole some Out BuHd a massage parlour and bankrupt lor undress) your opponent*, if they are unlucky A mmt version of ih i* same is now evadable on cassette The m a n version on disk i* much more expended end contaei* m between other things 40 pub* and bars. 20 gambling houses, and also no we won ' t ted Pley it safe (lor tokens) or play it hard I I you dare that is A S P H I N X C O M P U T E R G A M E

/ # GOLD f i nd your way 10 more than lor ty rooms, collect the treasures and try to get out w i th them Very addictive Wi th the game come instructions on how to w m a Memotech Memory E xpen* ion On the seme tape Pick B Word, a game of *k<ll Try and beat your children at it A H I L D E R B A Y G A M E

THE SECRET OF TAMWORTH MANOR A chance to WIN £1000 m real money, and have a lot of fun Into the bargain1

W * a m Tamworth bured the Tan i worth lamKy fortune near Tamwonh Manor during theOvil War. The Manor was razed to the ground, and Wiiiam was killed. Only old Charles Tarn worth knows about the tragedy. He learnt about it Itotn the (amity archives and has spent many years on research which has convinced him that the treasure « still there, just a few feet uxter the surface But he no longer needs the money. Charles Tamworth ts dying He has no descendants, arid chooses to leave the family secret to his best friend, wrapped up m riddles which only his friend should be able to understand

Somewhere M British sort IS a real treasure, worth' ONE THOUSAND POUNDS" Can you find it? Vfe are talkng about a 'Real TreasureHI"

Our adventure game, * 'THE SECRET OF TAMWORTH MANOR'' consistsof two cassette tapes and runs on Aran or ZX81. The first cassette which is available now oontans enough information to keep you busy lor quite some t arte. In order tokeep things fan- and give everybody an equal chance, we shall dispatch all the second tapes together, on the 31st of May This does not mean that the adventue w * not be a variable thereafter. It wit be. Somewhere in your travels (yes, there is some real 'out of doors adventure' involved) you may find unexpected help

The treasu-e is buned as token and only genuine pure! lasers ol the game can exchange tins token lor a cheque worth "ONE THOUSAND POUNDS " I t S thcr elore necessary to send us the form which comes with the tape Rease note that we shall only pay toa person wltose form is m our possession so make sue that it arrives, e.g. by sending it recorded delivery.

Do not ask lor any more information. All we are prepared to say is that the treasure is buried somewhere in the Home Counties, and definitely not near the first place you have ro find. Only clues there .

O R D E R F O R M GAME TITLE casset ie (16KI d isket te I48XI

ZX 81 Atar i Atar i Apple II THE NAUGHTY ONE Imm! version) 9 5C THE NAUGHTY ONE fmaxl version) 24 5 0 24 5 0 GOLD IA Hilderbay Game) 8 50 8 5 0 12 0 0 12 0 0 TAMWORTH MANOR 1 14 95 14 .96 —

TAMWORTH MANOR H 9 50 9 50 J

1

Name

Address

Post el Code

L

Town Remittance enclosed V A T i t included Please add SOp tor PErP it ordei las* than f 10 0 0

Send to

H 0 L D C 0 LTD 14 BRITTON STREET LONDON EC1M 5NQ

SPECIAL FREE OFFER

READ ON! THE FIRST FULL FEATURED COLOUR

COMPUTER AT UNDER £200!!

FEATURES •Sound "Colour "5K Memory Expandable to 27K 'Standard PET Basic 'Ful l size typewriter Keyboard "Graphics *Plug-in memory expansion "Low-priced peripherals.

SPECIAL OFFERS AVAILABLE WHEN ORDERING YOUR VIC 20 COMPUTER

3K RAM CARTRIDGE FREE or 8K RAM CARTRIDGE £37 95 inc VAT

or 16K RAM CARTRIDGE €54 95 incl VAT

PLUS FREE G A M E S TAPE WITH EVERY CASSETTE DECK ORDERED

THE FOLLOWING ITEMS N O W AVAILABLE

VIC 20 Co lour /Sound Compu te r VIC Data Cassette Deck VIC 3K R A M Car tndge VIC 8 K RAM Car t r idge VIC 16K RAM Car t r idge VIC Joyst ick Cont ro l A r f o n VIC Expans ion Un i t Mach ine Code Mon i t o r Car t r idge P rog rammers A i d Car t r idge " A v e n g e r " ROM Games Car t r idge "Super S lo t " ROM G a m e * Car t r idge " A l i e n " ROM Gamos Car t r idge "Super Lande r " ROM G a m e * Cart r idge "Road Race" ROM G a m e s Cart r idge In t roduc t ion to Basic (Part I) Carr iage & Ins. on i tems m a r k e d *

C £189 95 inct VAT* O C44 95 itscl VAT •Ji £29 95 inc l VAT • E44 95 incl. VAT GC74 95 inc l VAT : . £ 7 5 0 i n d VAT ; £97.75 .nci V A T * Ci £34 95 incl VAT C £34 95 inc l VAT • £19 95 .ncl VAT CL £19 95 itscl VAT

[ 1 9 95 inc l VAT C £19.95 inc l VAT L £19 95 incl. VAT

£14 95 mcl VAT • £3 45 incl VAT

TOTAL

All pr ice* Subject to Manu fac tu re r * Price C h a n g e *

437 Stoney Stanton Road.

Coventry. CV6 SEA West Midlands Tel: (0203) 661162

kBEK Name:

Address:

Please charge my Barclaycard'Access No.

• • • • • • • • • • • • • • D O

Signed:

Or telephone order. CVG6*2

Sharp MZ80K 48 K RAM

\ £379 2 year guarantee

Twin Disk Unit E620 Column Printer C399 Single Disk Unit ... F412 FURTHER ACCESSORIES AVAILABLE

Sharp ; MZ80B 64K RAM £1064 Fully Guaranteed Twin Disk Unit C620 Column Printer C356 Single Disk Unit C412 Graphic RAM II CPM RS232 Basic compiler ...Pascal. Double Precision Basic FDOS IEEE Interface

132 Col Printer & many more accessories available

Sharp 3201 Business Computer £1449 Monitor .... 1240 Printer f434 Twin Disk Unit 1649 Interface - f t 18

SPECIAL OFFER ON COMPLETE SYSTEM £2772

Sharp PC 1211 Pocket Computer £93 • Programs in basic • Quertv Alphabetical Keyboard • 1 9 K RAM •

(Long Battery Lile with interface C105) Printer for the above f67

VIC 20 £199

The Amazing Atari Personal Computers

Disk Drive. Printer & Cassette Deck Available PO A

V I D € 0 S€RVIC€S ( B R O M l € V ) THE BROMLEY CC 8 SUNDRIDG€ PRRRD6 - . . PtfHSTOW IRN€ 8ROMl€V K€NT , r K e s < n ckx i c w ' neor Suod ridge Pork StoOon & oy chonqe dunoq month

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Atari 2600 plus Combat E96.4S Philips G700 Computer Game of the Future only €84 Mattel tntellivision the most advanced computer game an unbelievable f 189

* Credit facilities available * Mail order - make cheques P Order

payable to Video Services Bromley PHONE FOR FURTHER DETAILS

THE BROMLEY COMPUTER CENTRE

32K upgrade for Atari 400 POA Atari 400 16K RAM Irom only £299 Expandable to 32K — ama / inu graphics 8t sound effects The game computer of the future must be seen to be believed Programs in Basic" "Assembler" -pilot Atari 800 16K RAM ..... £599 (Accessories for the Atari 400 800 Single Disk Drive f436 16K RAM f6S Atari 41C Recorder C60 Joysticks CI? 60 Printer Phone For Details

SPECIAL DISCOUNTS ON COMPLETE SYSTEMS

SOFTWARE Philips (G7000) f rom E12 99 Matel intelltvision f 16 76 VIC 20 Irom C14 96 Sharp Software from f6 32 Atari 400 800 from £9 96 (offering Arcade & adventure games + education & Business Applications) Atari 2600 f rom E15S0

T€l€PHON€ 01-460 4169/8833

CONTROL TECHNOLOGY Z X 8 1 1 6 k SOFTWARE

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MIAI.JJI SQUAS" NOH»H LN( F*H IN (NGlttH 11 MUCTKT. LAHOUALU TDANSLATOR I I -BIII *•> C.AVAL r M <™ N HIMN V ( * L«» 10 , OMIHJT N ADUR* RM NMKL • «*FFI GAWAL >1 FOU I H*

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CONTROL TECHNOLOGY PERSONAL COMPUTER SCIENCE

C t l M t t * I K 'AM* • « inn IK

ZX -81 h t r i r i AM*. MAT* J

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PACK te.'T • <E ; • IS A (any two only f5 9t> ALL tWA£E ONLY

Cf 16 [AN. ONLY « * •

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TAPt BOOK SO 1 • CASSETTE I BOTH OKLV

ate VOUASH BKtAiaUt CIXUWBJ SH.AI INtfGAATOI, CAtOIT CA*0CMCVAAT0A LAM* A C VATCHKK r*fw AAfTLC TOR«0C -lIlOAOf* BAlAm C0*rVf»TI* AMOLOtg IQtS A* P-n ||. rt VAtiM «

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39 GLOUCESTER ROAD GEE CROSS. HVDt . CHESHIRE SK145JG 061 368 nee

Ctech Sof tware Simply Megabytes

Ahead!

DEFENDER You defend the p l j ' f i ,nj.i nst UFO' i N .' moving. H«t> GrapTuci. Sound ef fact i . Thrust, laser l o r x f l o climb, descend, superbly detailed G4 • T5 (4 00 ASTRO BATTLEZONE '.im. • « l • II-. . ..cfccit u* n*ir iU»crur»w. you v i e * the 3 0 graphics rjf the earth twolvtng Uently behxiv. Staring down your head up dsplay you mddcMy ghrnps« the enemy hurtling towards you. you turn at Ihem the hori fon to** ovtir tint omjines roar as you cbmb to the stars G4 • T5 CS 00

FRUIT M A C H I N E Out versJOn has HiRes (tapriics. »udu< CoBotl, ftt i inn. gamble and even plays Oranges and Lemons ' when you yw i G3 • T 6 f 4 00 POLECAT Countrysida Packman you nvjs i mo»« vou' R»l)t»ii through the underground m a n , but you are b * n g chAMd by a polecat so you m u l t run like a rabbit until you ve col l« i»r t an vou' your carrots growing on the top ot the Burrow G4 * T5 £5 00

MINEFIELD You m u s t s t ve t y o n ' w a y t h - ( a i w mmefield without exptoding any mines, blasting mines can c a u w Cham reactions GO • T 5 f b 00 EARLY W A R N I N G Alom.. M Command, d ts i ioy t t * flttanking ICBMs j s m g a teai-stic tartar sceen and mine• o ; missiles G4 < T5 f 5 00

N R G GRAPHICS TEXT

ANY 3 ONLY £9.00 Control Technology, 39 Gloucester Rd, Gee Cross, Hyde, Cheshire SK14 5JG.

Allpnees include VAT. P&P


*

FULLER FD SYSTEM FOR ZX80/81 THE MOST VERSATILE SYSTEM FOR EXPANDING YOUR ZX

STANDARD KEYBOARD AND CASE

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Ful ler

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EXTENDED KEYBOARD AND CASE

F u l l e r

j i j ij ij 111 j i j i j ij i j iV 'I1'1'1'1'1'1.1'1'1'1'1

Keyboard Only Available! Built £24.95 Kit E l 8.95 ( +P.P. 80p)

This sp lend id keyboard and case houses your Z X 8 1 pr in ted c i rcu i t board , w h i c h is s imp ly sc rewed in to place, the keyboard p lugs in to the ZX. You can n o w enter data w i t h ease. The 4 0 key s w i t c h board is a c u s t o m un i t no t made up ou t of o ther manu fac tu re rs parts. The key tops are our o w n des ign and have the ZX Q w e r t y and f unc t i ons fo i l p r in ted o n t o t h e m . Access to the u s e r p o r t , TV, M IC , and ea rsocke ts are as per the ZX case. Built keyboard and case £36.70 or £30.70 as a kit plus £2.10 postage and packing.

The case is des igned to house no t on ly the keyboard and ZX but also our mo the rboa rd , p o w e r supp ly , R A M cards and t w o o ther boards, no t necessar i ly of our manu fac tu re . The in jec t ion mou lded case measures 2 0 0 m m x 3 5 0 m m x 6 0 m m and houses a 4 2 k e y s w i t c h board , the extra keys can be assigned to o ther func t i ons . The case is suppl ied w i t h a " P o w e r O n " LED.

Built keyboard and case £39.95 or kit £33.95 plus £2.50 postage and packing. Motherboards £15.95 plus 80p postage and packing. 16k RAM board £35.95. 64k RAM board £79.95.

Sand SAE for details to:-FULLER MICRO SYSTEMS. The ZX Centre,

Sweeting Street, Liverpool 2.

N O W I N S T O C K O N 1 6 K C A S S E T T E : FROGGEB • £22.96

CROSSFIRE 9 £19.96 SHOOTING GALLERY

£15.95 RACE IN SPACE P £15.95 Plus: o n 3 2 K D I S K : MOUSKATTACK • £22.96

•THRESHOLD lunbafitvatile graphics!) •RASTER BLASTER

(real pmbal l l l • A L I BABA II 40 THIEVES

•ULVMiES^S GOLDEN

•Call lor Pricet [ P A P ^

AIRSTRIKE F°r The atari 400 M O R E A T A R I

S O F T W A R E D U E S H O R T L Y !

• INTRODUCING THE NEW SCRAMBLE TYPE' ARCADE GAME FOR A T A R I COMPUTERS ! • SUPERB S C R O L L I N G GRAPHICS WITH D A Z Z L I N G COLOURS ! • 100% MACHINE CODE PROGRAMME FOR ONE OR TWO PLAYERS ! • MULT IPLE S K I L L LEVELS - FIGHT YOUR WAY THROUGH C A V E R N S A N D T U N N E L S W I T H A T T A C K I N G MISSILES FUEL A N D AMMO DUMPS TO C O N T E N D W I T H I • A V A I L A B L E NOW: 16K CASSETTE £15.95 ) P ) u i 50p P 8. P

32K DISK £18.95 ) NEW T ITLES: * C R Y P T S OF T E R R O R - 1 6 K A D V E N T U R E « K R A Z Y SHOOT OUT C A R T R I D G E

• A M E R I C A N F O Q T B A L L - 1 6 K • CAVERNS OF MARS—16K • C O M P U T E BOOK OF A T A R I • S A N T A CRUZ TRICKY T U T O R I A L S

NOW IN STOCK : A T A R I T V GAMES PLUS ACT IV IS ION CARTRIDGES A T DISCOUNT PRICES ? WATCH OUT FOR PACMAN A N D DEFENDER !

N A T I O N W I D E M A I L ORDER SERVICE ON A L L PRODUCTS - SEND STAMP OR C A L L NOW FOR D E T A I L S

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For The ATARI 400 S00

JAW BREAKER 16K CASSETTE/32K D I S K £ 1 9 . 9 5 P lu i 5 0 p p A p

This arcade game I d k n you (o the candy store fo i .1 II i ld game ot tag with vomr of ih r u n i d m l playmates you'l l f ind anywhere If you t an rat all the sweets, the b u l l y kids wil l stop bothering you and altet a quick stop and a brushing ot thr teeth. It 's off to the store fur another day of s w i f l s and tag.

• F ull Colot Hi-Res Graphics • Automatically Escalated Skill Level • Quick Moving Animation

ATARI MCftOCOMPUTERS

50 Newton St.Off Piccadilly, Manchester Ml 2EA. Tel: 061 2363083

. * COMPUTER CHESS GAMES ATARI

Commodore VIC PLUS GAMES NOW IN STOCK' 400*800

89 COMPUTER 8t V IDEO G A M E S

ZX8V ZX81 HEWSON CONSULTANTS

HINTS & TIPS for the ZX8 l } £3.95

by ANDREW HEWSON THE MOST COMPLETE BOOK AT THE PRICE

Good value and qu i te fasc inat ing a very inexpens ive w a y of acqui r ing m o n t h s of p r o g r a m m i n g exper ience" YOUR COMPUTER Nov 81 'Excellent . . very g o o d va lue for m o n e y " SYNC

Sav ing Space . . . Unde rs tand ing the Display File . . . Conver t ing ZX80 Programs . . Chain ing P rog rams (pass data be tween p rograms, call subrout ines f r o m cassette, establ ish data files) . . . Mach ine Code Programs (wr i te, load, edit , save and debug mach ine code) Rout ines and p rog rams are scattered l iberal ly t h roughou t the text and the f inal chapter consists of twe lve useful, in terest ing and enter ta in ing prog-rams.

16K RAM PACK £34.95 A top qua l i ty add-on 16K dynamic m e m o r y spe-cially des igned for i h e Z X S l . S imp ly p lugs into the port at the back of your Sinclair Can be used in con junct ion w i t h t heZX pr inter . Neat ly packaged in

Incredib le a black plastic shel l to match y o u r Z X 8 l . value, w h y pay more?

64k MEMOPACK £79.00 Developed by M e m o t e c h this amaz ing 64K R A M needs no extra power supp ly S imp ly p lugs neatly and f i rmly in to the rear port o f your ZX81 Can be used w i t h the ZX pr imer and other add on hardware Just look at these features: * 8-16K can be sw i tched in and ou t in 4K blocks to leave space lor

m e m o r y m a p p i n g * 12-16K can be protected against o v e r w r i t i n g du r i ng load ing f r o m

cassette * Direct ly addressable and user t ransparent * Up to 15K of basic p r o g r a m area * 32K or mo re of var iables area * Add i t iona l rear edge connector for use w i th other add-on hardware * Facts sheet FREE w i t h each R A M purchased

16k SOFTWARE OR CASSETTE PROGRAMMERS TOOL KIT £6.50 Are you w r i t i ng you r o w n i t h e Z X B l ? Then use o u r TC

programs for K3LXIT to do

the donkey work . Copy it into R A M before y o u start work then you w i l l have it at your f inger t ips . Comprehens ive LINE RENUMBER inc lud ing GOTOs and G O S U B s ; L O A D , EDIT a n d R U N mach ine code p rog rams . INSPECT the ZX81 sys tem rout ines; COPY t h e m in to ' i f " R A M and PATCH a n d or EXTEND t h e m ; ' ' ' FIND a g iven piece of Basic code and REPLACE all occurrences of i t ; m o v e blocks of Basic l ines w i t h EDIT Sits above r a m t o p so y o u can use it w i t h ex is t ing p rog rams

SPACE INTRUDERS 40 al ien sh ips in each squadron. A l l act ion display Au toma t i c op t i on — the mach ine plays itself, can y o u do better? Wr i t ten in mach ine code for super fast fun. S q u a d r o n after squad ron attack you r posi-t ion. Three laser bases. Full score display.

Z80 OP CODES A must for the beg inner and the exper ienced p r o g r a m m e r alike This handy ready reckoner l ists all 600 p lusZSO mach ine code instruct ions in dec ima l and hexadec ima l w i t h thei r mnemon ics Each Op Code is succinct ly exp la ined and cross-referenced Suppl ied in a protect ive t ransparent wal let for easy reference and durabi l i ty .

Send SAB for full catalogue ot software and hardware Software titles include 'Pilot'. 'Statistics', 'Planetlander' ,

All prices include VA.T, and P&P

Cheque with order or quote Access or Barclaycard number to HEWSON CONSULTANTS. Dtfpt C.V.G . 60A St Ma ry ' s Street . Wal-l i ng fo rd , Oxon, OX 10 0EL TEL: (0491} 36307 PHONED ORDERS WELCOME

£5.95 ' /

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£1.45

Upgrade your atom with our new low cost disc pack

only £299 PLUS VAT

40 - ireck tingle tided 554" ditc drive - POMI supply to run both the due pack and a fully expanded Atom - disc controller card with 4K DOS ROM

3k bytes of static RAM - 64 way Euro-connector plug and cable - full operating instructions and manual

The disc controller n based on the Intel 8271 chip. This highly itellrgent device minimises the amount of control software and memory requirement and to allows phenomenal high ipeed operation. Both toft and hardware has been vigorously tested and proved very, very reliablir

You will need an Atom mth bus buffers and indirect edge connectors The mail order price rs £350 including VAT pott, packing and insurance, the price at your Atom dealer £345. If you do not have a dealer near you just write to us at flte address below,

or credit card holders can ring Cambridge (02231 245200 and order directly

Acorn Computers Ltd. , ^WCORN Fulbourne Road, COMPUTER Cherry Hinton, C A M B R I D G E

The disk operating system (DOSI decodes the following command$.used to control the storage of files on disk: — * CAT catalogue tiles on disk * LOAD load image of memory contents as file * SAVE save image of memory contents as file * DELETE delete file from disk * SPOOL store all printer characters on disk * EXEC read characters from disk as if from keyboard The DOS also replaces the cassene operating system vectors as used by BASIC to allow the use of the following commands in Atom BASIC:— LOAD load BASIC program from disk SAVE save BASIC program to disk FOUT open file for output FIN open file for input SHUT close file EXT find extent of file PRT find value of pointer into file PUT put number to file BPUT put byte to file SPUT put string to file GET get number from file BGET get byte from file SGET get string from file These commands provide full random access of up to 5 disk files simultaneously.

90 COMPUTEH 8c VIDEO GAMES

m

PROTOS 2 KEYBOARD AND ENCLOSURE FOR ZX81

IDEAL FOR THE CLASSROOM, INDUSTRY, OFFICE OR HOME • Top indus t ry spec i f i ca t ion c o m p u t e r keys, not ca lcu la tor types, a n d

g o o d for 6 m i l l i o n ope ra t i ons . • Heavy g u a g e steel b o d y enc los ing 2 X 8 1 PCB and keyboa rd —

w e i g h t 1.5kg. • No so lde r i ng — c o n n e c t o r s m t m m i c k ZX81 connec to rs . • Jus t 3 f i x i ngs fo r ZX81 PCB a n d 2 sc rews f ix case. • Despatch w i t h i n 7 days of o rde r .

£ 5 7 . 9 5 inc V A T + £ 2 . 5 0 p + p CHEQUES TO "FROME COMPUTING". Details large SAE.

PROTOS COMPUTER SYSTEMS, FROME COMPUTING, 20 ASHTREE ROAD, FROME, SOMERSET, DA11 2SF.

VIC 20 SOFTWARE Q U A L I T Y S O F T W A R E FOR T H E 3 . 5 V I C 2 0 C O M P U T E R

DEFLEX Fast-moving action and spectacular colour and sound effects add to the excitement of this original game. Deflect the rapidly moving ball to hit stationary or moving targets. Records top ten high scores. 20 skill levels.

ROX At last an original and compulsive space game. Defend your moon base from the deadly ROX from space. Increasing levels of diff iculty and superb visual and sound effects make this the greatest new arcade-type game since Space Invaders. DEFLEX and ROX o n s a m e casset te £4.95

ROX III 8K version of a popular 3.5K game.

3D LABYRINTH VIC version of the Labyrinth game using excellent hi-res graphics.

Both program run hi res graphics on Basic machine plus 8K of RAM. Both for £5.95.

SOFT KEY DEFINE PROGRAM Written in machine code, allows you to program your function keys wi th 24 of the most popular keyboards i.e. Fl RUN etc. Runs on any memory size £3.95.

23

TEN SUPERB 3.5 PROGRAMS ALL TEN FOR £6.95

GEM + Creale and store your own custom character sets. TANX Tank battle for 2 players. MUSIC Encode tunes in three-part harmony up to 130 notes long on 3.5k machine SPACE ZAP Destroy alien spacecraft attacking your space station. BREAKOUT Superb sound and colour effects. HI-RES Sketch on a 128 x 128 pad using keyboard or joystick. SPIRO Create spirograph-type patterns in hi res. VIC TRICKS • Program demonstrates the special uses of VIC chip registers. MASTERMIND Uses colour and sound to the full. WORD GAMES Unusual and challenging game for 2 or more players

Sussex Road, Go r l es ton , G rea t Y a r m o u t h , No r fo l k . T e l e p h o n e : Y a r m o u t h (0493) 602453


MICROLINE 80 £289 VAT • SOcpsUr* directional • Small w e 342 IW • 2S4IDI • l O e i H I m m • 160 Characters. 96 ASCII end 64graphics • 3 Character ( U M 40. 80 or 132 chers/kne • Fnct>on and Pin Feed • Low noise 66 d 8 • Low weight 6 5 kg

MICROLINE 82 £449 VAT • 80 cps Bi directional logic seeking • S m a l l si/p 360 <W> , 328 'D i • 130 11.mm • 160chardciers 96ASCI Iand64 graphics, with 10 National character set Variants • 4 Character sites 40 66 80 or 132 chars Wie • B u i l t in parallel and senal interfaces • Friction and Pin Feed • Low noise 66*16 • Low weight 8kg

MICROLINE 83 £649 vat • 120 cps bt directional togK seeking • 138 column pnnt ing on up to l S n forms • Smew sue 512 IWl • 338 1D1 - 130 [HI mm • 160 characters. 96 ASCII and 64 graphics with 10 National character y i variants * 3 Character s p a c i n g 6. tO and 16 5 Chars m • Built in parallel and aerial Interfaces • Fnction and Pm Feed • Low noise 66dB • L o w weight 13 kg

THE ANADEX DP9500 and DP9501

A PROFESSIONAL PRINTER

• B> d»ectional print ing • Up to 220 chars' l ine

j v t h 4 prmt denvties • GOO char buffer

»RS232C and Cemiome* ParaW interface built m

• Full software control of mat rn I n dliowmq graphics capability

• 200 chars'sec • Adtustabte width tractor teed

DP9500 - ONLY £845 .vat DP9501 - ONLY £896 *vat

WE ARE NOW STOCKING THE APPLE II AT REDUCED PRICES

AUTOSTART EURO. PLUS

48 K £649 • VAT

Get t i ng S ta r ted APPLE II is taster sma ipr and more powerful than its predecessors And it's more tun to use too because of built m teatures i-k* • BASIC The Language that Makes Programming Fun. • High Resolution Graphic* <m a M.000 Point Anay l for F in r ) D e t d - d Diwlays • Sound CapalH'ty that B'mi js Programs to Life • H i n d C o n t r o l tor Garnet and Ot lwi Human Input App anon* • lnter'..i Memory Capacity of 46k Bytes o< RAM 12K Bvles o l ROM lor Big System Per formance *> a Small Package • Eight Accessory E i p a n s o n Slots to let the System Grow With Your N « r h

You don' t need to be an eipert to «n|oy APPLE II It is a complete ready to run compuler Just connect it to a video display and start using programs lor writ ing your own I I he first day Vou « f ind lhat -is tutorial manuals help you make it your own personal problem solver

- f l b a APPLE DISC II

3.3 Dos Disc w<th ControMer

' £ 3 3 9 - vat Additional Drives

£289 • Power' .1 Disk Operating Software Supfions up to 6 drives • Name Accem to Files tor Ease o l Use • BASIC Program Cham-ng to Link Sof tware Together • Random or s«)uent ie l Fi«r Access to Simplify Programming • Dynamic D-sk Space Aloca l ion tor Efficient S im age • Irvjividuai f ' * Wme Protection Elurvnate* Accidental F .. Alterations • Loads an 8K Byte Binary Inuyn in 6 5 Sec I 1 . 2 w c . m Pascal! • S t o r a g e Capacity o l 116 kilobytes 1143* Bytrs wi th Pascal! on Standard 554" Diskettes • Powered Directly From the APPLE I Up to 6 Drives! (or Convenience and High Reliability • Packaged m Heavy Duty. Colour Coordinated Steel Cabinet

Colour Monitor* for Apple €216 + VAT

LUXOR 14" COLOUR MONITOR FOR THE APPLE £296 - VAT

THE EPSON M X SERIES

• 80 132 Column • Centronics Parallel • fl' directional • Upper f j l ower case • True Descenders • 9 * 9 ^ o t M a i m • Condensed and Enlarged Characters • Interfaces and Ribbons ava4able

MX80T £339 • VAT MX80F/T £389 * VAT

CENTRONICS DOT MATRIX

PRINTERS

Ida*' for small businesses. schools, collage*, homes, etc Suitable for the espenenced inexperienced hobbyist teacher, etc

737 £369 • VAT

739 £469 • VAT

S tandard Features • Proportional Spacing • Right Margin Justification • 3 way paper handling • Upper and lower case • True Descenders • Bi directional Paper Mode • Underlining capability • Condensed Expanded Print • Sub Scripts and Super Scripts • Pm and Friction Feed • 80 132 Column

739 mm above w i t h special fea tu re of D o l Reso lu t ion Graph ic* .

NEC SPINWRITER

only £1490

4 VAT

NEC's high quality printer uses a print " th imble ' ' thai has less diameter and inertia than a daisy wheel, giving a quieter, taster, more reliable printer that can cope with plott ing and printing 1128 ASCII characters! w i th up to five copies f r< tion or tractor fed The ribbon and thimble can be changed in seconds 55 characters O f second bidirectional printing wi th red Mack. bold, subscript, superscript, proportional spacing, tabbing and much, much more

NOW INCLUDED: Sound Upper and i w la te E.tended BASIC and Machine Code enabkng the Writing and Execution o l Machine Codes Programming direct f rom Keyboard 16K RAM 12K Microsoft BASIC Entenuve Software Range Self Contained PSU UHF Modulator Cassette Enter rial Cassette Interface Simply plugs mto TV or Momtoi Complete and Ready to Go Display i* t lines by 32 o i W Character* Switchabte Mannuai* inci-jited. Usen Gwdv Beginners Programming and BASIC Reference Mannuai BASIC Program Tape Supplied P«el Graphics

£299 • vat The NEW GENIE I I .i< - - s - - -»f b „ n n . s Ma. t o 13K Mcroso l t BASIC « ROM 7t Krytward Nument Keypad Upper f» Lower Case Standard Fleshing C u n v Cassette Interlace 16K RAM Expanded e . te r .u i i , so 48k

HITACHI PROFESSIONAL

MONITORS 9 " £ 4 5 9 £99.95) 12" £469 £149 J VA1

• Rel iabi l i ty S o M Hate circuitry . t ing an IC and silicon trans<stors ensures high ratability • H O Mnea hor i zon ta l reso lu t ion Horizontal resolution in eacess of bOO lines i i achieved m picture center • Stable p i c tu re Even played back pictures o l VTR can be displayed without tittering • Loop ing v ideo Inpu t Video input can be looped through with built in termination switch • E i t a m a i *ync opera Uon I available as option for U and C type*) • C o m p a c t c o n s t r u c t i o n Two monitors are mountable side by side in a

standard 19 inch rack

ACORN A T O M UNIQUE IN CONCEPT -THE HOME COMPUTER THAT GROWS AS VOU DO

j f Futy ASSEMBLED £ 1 5 7 . 5 0 VAT i nc . PSU

GENIE I £r I I EXPANSION UNIT WITH 32K R A M £199 VAT

PARALLEL PRINTER INTERFACE C A R D f » 00 • VAT

T E A C DISK

DRIVES

TEAC FD 50A lias 40 tracks giving 125* Bytes unformatted Single density capacity The F0 50A can be used n double density recording

• The FD 50A i* Shugart SA400 -ntr . ' i. r o n . pat.l • Directly compatible A th Tandy TRS80 mpanaon

interface • Also interfaces with VOeo Gen* . SWTP TRS80

North Star H or i ron Superbram Nascom etc etc • Address selection for Daisy chaining up lo 4 Disss • Disks plus power supply housed in an attractive grey

case 40 TRACK Single £225 . vAT D « ' b *

Special features nc»ude • Fu Sued Keyboard • AwemWer and Banc • Top Quality Moulded Case • opt ional High Resolution Colour Graphics *6602 Microprocessor

4K FLOATING POINT ROOM £19.50 * VAT

COI OUR ENCODER £19.00 • vat iWe give a full one year s guarantee

on all our products, which normally only carry 3 months guarantee

A SELECTION OF APPLE INTERFACES ARE NOW AVAILABLE AT OUR EDGWARE ROAD SHOWROOM

Disk Drive D<sk Onve £389 VAT 77 TRACK

str ive £299 .VAT Douce r a o q Disk Drive VAT

^ ^ MEMORY UPGRADES 16K (8x4116) £12.90 'Vat

4K Compukit (8 x 2114) £12.90 VAT

WE HAVE ONE OF THE LARGEST COLLECTIONS OF COMPUTER BOOKS

UNDER ONE ROOF. ALONG WITH SOFTWARE FOR THE GENIE,

TRS80 AND APPLE.

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THE NEW a EXCITING

TRS80 MODEL

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48K £599 - vat The R . n » Shock TBS 8 0 ™ Model Ol i t a ROM bated computer system consisting ot • A t2 inch screen to display results end other inlormanon a A 85 key console keyboard tor inputt ing programs end date to the Computer • A Z 80 Microprocessor the "brawn" o l the system • A Real Time Clock • Reed Only Memory tROV containing the Model III BASIC Language ifully o ipeM'» wi th -os* Model I BASIC programs! • R a n d o m Access Mr-mory i f l A V lor storage o l programs and data wnile the Computer is on I amount * expandable f rom " 16K" to"«8K" opbonalextral • ACassette Interlace lor long term storage or programs and data Uequnes a separate cassette recorder optional extral • A Printer Interlace lot herd copy Output of programs and data {require* a seperaie kne pr>n*ei optional extra •Expans ion area for upgrading to a disk twveit system I optional extro • Expansion area tor an RS 232 C *er«! communication* interlace lop t iona lex t ia l AH trwte component* are contained m a tingle moulded ca*e, and all are powered vta one power cord

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Plug in and go e Kansas Crty Tape Interface on boar* * Free Sampler Tape including powerful Disassembler and Monitor wi th each Kit e II you want to learn about Micros, but M n ' t know which machine to buy then tht* is the machine tor you

NEW MONITOR IN ROM ava<i*ble sepe'irety at C7.M . VAT Improved BASIC 3 ROM revised GARBAGE routne allows correct use c t STRiNG ARRAYS f « *> This chip can be to ld sepa'ately to ex*t'rng Compukit end Super board users * VAT

FOR THE C O M P U K I T A * » m 6 * ' Editor 114 90 Case lor UKIOt £29.60 G A M E PACKS 1 Four G«m<><. fS 00 2 l Fout Games IS 00

Super Space invaders 18K1 ( 6 50 Chequer* ( 3 00 Realtime Clock f ] 00 10 x C12 Cassette* (4.00 40 pin Expansion Jumper Cable I t SO AH Prices est

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It 's a new kind of musical instrument A computer connoted synthesiser that helps you create, play and arrange compos* tions that normally lake years of mu*ic training A l to a calculator

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De l i ve ry rs a d d e d at cos t P l rus i ! m a k e c h e q u e s a n d pos ta l o r d e r s payab le t o COMPSHOP LTD., or p h o n e your order q u o t i n g BARCLAYCARO. ACCESS. DINERS CLUB or AMERICAN EXPRESS n u m b e r I ry TTW;y-1j J l M j E T T t T ^ ^ ^ M CREDIT FACILITIES ARRANGED s e n d S A E lo r a p p l i c a t i o n f o r m

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COMPUTER 8r VIDEO GAMES 93

ZX 80/81 HARDWARE/SOFTWARE

ZX KEYBOARD Now with repeat key and facilities to add numaric pad. The keyboard has all the 80/81 functions on the keys, and will greatly increase your pro-gramming speed. It is fitted with push type keys as in larger computers. The keyboard has been specially designed for the Sinclair computer and is supplied ready-built. It also has facilities for 3 extra buttons which could be used for on/off switch, reset, etc. £27.95. Numaric add on £10.

4K GRAPHICS ROM The dK Graphic module is our latest ZX81 accessory. This module, unlike most other accessories fits neatly inside your computer under the keyboard. The module comes ready built, fully tested and complete with a 4K graphic ROM. This will give you 448 extra pre-programmed graphics, your normal graphic set contains 64. This means that you now have 512 graphics and with there inverse 1024. This now turns the 81 into a very powerful computer, with a graphic set rarely found on larger more expensive machines. In the ROM are lower case fetters, bombs, bullets, rockets, tanks, a complete set of invaders graphics and that only accounts for about 50 of them, there are still about 400 left (that may give you an idea as to the scope of the new ROM). However, the module does not finish there; it also has a spare holder on the board which will accept a further 4K of ROM/RAM. This holder is fitted with a 1K/2K RAM and can be used for user defineable graphics so you can create your own custom charactor sets. £29.95.

MEMORY 80/81 16K RAM Massive add-on memory for 80/81. £32.95. 16K KIT-A-KIT VERSION of a 16K Ram. Full instructions included. All memory expansions plug into the user port at the rear of the computer. 16K RAM £42.95 16K KIT £32.95 2K & 4K RAM Static Ram memory expansion for the 80/81. They both work with onboard Ram i.e. 4K plus onboard = 5K. This is the cheapest small memory expansion available anywhere. 2K RAM £14.95. 4K RAM £19.95. IO PORT Interface your computer with the real world, our IO port has holders to add up to 6K of RAM. £12.95.

16K 81 SOFTWARE As seen at the ZX Microfair. DEFLEX This totally new and very addictive game, which was highly acclaimed at the Microfair, uses fast moving graphics to provide a challenge requiring not only quick reaction, but also clever thinking. One and two player versions on same cassette. £3.95 3D/3D LABYRINTH You have all seen 3D Labyrinth games, but this goes one stage beyond; you must manoeuvre within a cubic maze and contend with corridors which may go left/right/up/down. Full size 3D graphical representation. £3.95. CENTIPEDE. This is the first implementation of the popular arcade game on any micro anywhere. Never mind your invaders, etc., this is positively stunning, the speed at which this runs makes ZX invaders look like a -game of simple snap. £4.95. Graphic ROM Software Centipede. The graphic ROM version of our popular Centipede game. The only real version of Space Invaders on the ZX81.

cK'tronics 23 Sussex Road, Gor leston, Great Yarmouth , Norfo lk . Telephone: Ya rmou th (0493) 602453


THIS IS FRED McN ASH WHO HAS NO CASH HE CAN'T COMPUTE WITHOUT SOME LOOT WITH THINGS SO EXPENSIVE HE FEELS VERY PENSIVE BUT DON'T BE SAD IT'S NOT THAT BAD WE'VE MANY PERMS OF EASY TERMS APPLY FOR QUOTATION FOR YOUR EDIFICATION I M W U OTFICKL MINT fon TH* BBC COaaPUT

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Fol low England, Scot land and Northern Ireland along the 1982 Wor ld Cup Trad Every week there's the latest news and pictures to keep YOU up to date, as we l l as all the Fooibal l League reports and gossip.

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MORE SUPER PROGRAMS FOR

APPLE S& ATARI'S APPLE PANIC. HI-RES arcade madness! You have to climb ladders and dig holes to try to trap the monsters that persue you, then cover them up before they can escape Many levels of play to keep you enthralled Apple 48K Disk " £20.70. Atari 32K Disk £20.70 TANKTICS. Armoured combat on the Eastern Front of WWII For strategists, this game will give hours of enjoyment and comes complete with large full colour map board and over 200 counters Apple 16K Cass £16.50 Atari 24K Cass £16 50 ALI BABA & THE FORTY THIEVES. Guide your alter ego Ali Baba through the thieves mountain den in an attempt to rescue the princess. Treasure, magic and great danger await you' One or more playerscanguideupto 17 friendly characters through the many rooms and halls. Some characters just wander around randomly. This program is written in Hi-Res Colour and includes sound and music Adventures can be saved to disk to complete later Atari 32 K Disk £23 00 GALACTIC CHASE. Galaxians type arcade fun. Atari 16K Cass £17.25 Atari 16K Disk £20 70. APVENTURE TO ATLANTIS. Apventure to Atlantis has just made computer adventuring better than before Can you imagine the most exciting adventure game ever composed with more colour, sound, highly detailed animation arcade style action, true role playing, greater challenge unending variety and endless enjoyment? That is what this is. together with a super adventure where the forces of sorcery are gathering to repulse the marauding scientific At lantean Kingdom The epic battle can end in the enslavement of the world or the absolute destruction ol Atlantis,

£27 60 Apple 48K Disk (DOS 3.3) HADRON. Hadron is a wild chase through a speeding Asteroid belt Fabulous 3-D effects actually allow your ship to duck behind asteroids while following enemy space craft to their base Apple 48K Disk £24 15. SNACK ATTACK. A Pac-Man type arcade game which is one of the Top Five best sellers. Apple 48K Disk £20 70.

DEALERS! Check out our list of over 170 selected programs, from more than 20 manufacturers, for Apple's, Atari's, Pet s. TRS-80's. VIC-20 s and even IBM. The best American games software available from one source at a full trade discount — and that can save you a lot of time, effort, trouble and money. Allow up lo 28 days for del ivery All pr ices include V A T and P & P

AUDIO VIDEOOFFERS. FREEPOST. HODDESDON, HERTS. EN11 8BR

Please rush me the following Programs/Dealer | Information

1 2 Name... Address. Postcode.

COMPUTER 8r VIDEO GAMES 95

flriGLD ffllERiCfln S O F T W A R E C D UK Distributors for Automated Simulations

Hellfire Warrior The sequel to the best-selling "Temple of Apshai", "Hellfire Warr ior" gives you the challenge of more command options and more detail than you've ever imagined!

Four new levels with sixty rooms each will test the character of the most experi-enced, the most intuitive, the most intel-ligent adventurer. On Level 5. you'l l have to outwit giant insects to stay alive. On Level 6, you'l l discover that it's as much a puzzle to solve as a dungeon to explore —

because the only exit is hidden some-where within the complicated labyrinth. On Level 7, you're constantly trying to escape from skeletons, ghouls, mum-mies, and even invisible ghosts But the culmination of your adventure is on Level 8, an underworld haunted by lost souls, guarded by dragons, riddled with bottom-less pits and blasts of hellfire.

Price £19.50

Temple of Apshai Now, you can enter a universe in which quick wit, the strength of your sword arm and a talisman around your neck might be what separates you from a pharoah's priceless treasure — or the death-grip mandibles of a giant mantis.

Enter the 'Temple of Apshai", the first in our DUNJONQUEST series, the com-puter game that offers you the chance to undertake heroic acts in a labyrinth filled with treasures, traps and monsters.

'Temple . . . " is a role-playing game (RPG) that catapults you into a world of magic and monsters, doomed cities and damsels in distress.

More than a game, it's an alter ego

experience. In an RPG, complex factors that make up a human being are ab-stracted into a few basic characteristics; strength, constitution, dexterity, intelli-gence and ego. Vis your role playing character, you'l l venture into an essen-tially unknown world, and be at home with the likes of skeletons, zombies, spiders and wraiths.

When you play the " T e m p l e of Apshai", you'l l be both a character within and a reader of the epic you're actually helping to create. In this labyrinth, the choice is always yours . . . fight or flee, parry or thrust, slay the monsters or see if they'll listen to reason. Price £19.50

DEATH MAZE

A new breed of adventuring! Venture through a graphically represented 3-0 maze, with halls that could dead end — or recede to infinity. Step through the doors or drop into the pits. Wil l you encounter monsters and mayhem, or wil l you be treated to useful objects and information? Will you ever gel out alive? Price £11.75

ASYLUM You are sitting alone at 2am. Your eyes are bloodshot as you peer into your com-puter's screen and cry, "I must be crazy!" if this has never happened to you, you've never tried ASYLUM. It's Med Systems most ambitious 3-D graphics adventure yet!

ASYLUM places you on a cot in a small (padded?) room. Periodically the janitor lobs a hand-grenade through the win-dow. What you do next could mean escape — or disaster. Price £13.75

LU

A nightmare of an adventure in graphi-cally depicted three dimensions. Cor-ridors stretch toward infinity right on your TRS-80 screen as you search this maze for treasures. If you get the feeling you're not alone. It's because you're not!

You use the arrow keys, plus two-word commands to move, manipulate objects and avo id the many p i t fa l ls (pun intended) that await you in Labyrinth.

Price £11.75

Send 75p for ful l catalogue (Refundable against purchase) Dealer Enquiries Welcome

Crush, Crumble and Chomp! Breathe fire, terrorise cities, snack on a horrified populace, and further develop your vi l lainous personal i ty. CRUSH. CRUMBLE, and CHOMP!

Is there a particular city against which you crave to wreak revenge? Do you have a grudge against the Golden Gate Bridge? Lunch on San Francisco, then. Can't con-trol your burning desire to consume the Pentagon? Dine on Washington, D.C. Fed up with cheap imports? Tokyo, perhaps. Do you hunger for the Big Apple? Munch on New York.

Be the deadly amphibian who longs to leave trails of poisonous nuclear pollu-tion, simultaneously smash street cars with a single blow of your scaly tail, lunch on helpless humans, and radiate a ray of death from your malevolent eye.

Or would you like to be, perhaps, not even of the fallible flesh but. rather, of horrendously heartless steel? A lifeless, but life-like, mechanical gizmo prepro-grammed by zero population-growth pro-fessionals for the destruction of all things earthly.

If you were a giant winged creature, think of the aerial attacks you could make on the terrified but tasty tidbits beneath you.

Take on the persona of any of six demonic beasties (even more for those who have a disk). Select f rom four mouth-watering metropoli and five dif-ferent objectives, over 100 possible scenarios, comple te w i t h graphic mayhem and the resounding thunder of your monsterly presence awail your beasts appetite.

But wait! The National Guard is out to get you. The local police are sworn to your destruction. Even as you read this, a secret weapon is being readied against you by mad and skillful scientists Are you truly prepared to face helicopters, tanks, artillery, and more, driven by those who are literally dying to get at you?

Sooner or later, humanity wi l l tr iumph . . . maybe Or maybe vengeance wil l be yours. Price £15.50

ANGLO AMERICAN SOFTWARE CO 138a Stratford Road, Sparkhill, BIRMINGHAM, B11 1 AG 021-771 2995 24 hour ansaphone


flriGLD flfTlERkCfln S O F T W A R E C D TRS-80 = ATARI = APPLE = VIC

We know what it is like out there, because that's where we came from. Before we decided to become software entrepreneurs, we were just like you enthusiasts searching through magazines for the ideal mail order software source. What we hoped to f ind was a single entity that offered an ultra-wide selection for our micro-computer. That pre-selected only the best of many similar sounding programs that reached the market every month. That could give us personal assistance wi th the purchase-decision process, and that stood behind its products. When we couldn ' t f ind it we decided to become it. So ANGLO-AMERICAN SOFTWARE CO WAS BORN.

Please state clearly the program(s| you require. Include your name, address & machine type + memory size. Prices include VAT, postage & packing.

COSMIC PATROL Skilled player* t oon master many difficult computer game*. but COSMIC PATROL la in • wor ld ol its own The challenge intensifies' Supporting graphics and sound (optional) make each encounter an exciting new experi-ence it all adds up to a Super 3 S package Skill. Sight and Sound

frfW— another search and deatroy game With its fast

The Cosmic Patrol program is not just

real t ime action. Impressive sound opt ion* and superb graphics, this machine language pro gram ia the best of its genre

Pace Cassene £12 50. D IM £16 25

BATTLEGROUND Here is a program that should interest you war gamers

II is late 1M4. and the Allied Forces are sweeping towards Berlin As General of your sector, you have at your command tanks, planes, artillery, infantry, engineers and vehi cles — an awesome array of fighting men and the machines of war From intelligence reports you know that the enamy General is a shrewd tactician not to be under an imated it wi l l take planning and strategy to outwit this wi ly o ld campaigner

The battle map of your sector wi l l fill w i th markers, each showing the deployment o l your forces You and another player wi l l slip into the roles of opposing German and American commanders as yet another battle unfolds Batt leground allows you to experience the total responsibility of a battle-area command. It wi l l be up to you to deploy your forces. On your shoulders rests the decision whether to cell for direct artillery gunfire or to order your planes into the air You wil l constantly be watching for an enemy airdrop, always care-fully manoeuvring your forces

Tha stark reality of Wor ld War II cornea alive in BATTLEGROUND Cassette Price £8 00

PROGRAM OF THE MONTH TLDTS A DLDIS You've bought a super maching-code pro-gram. but now wonder how it works Maybe you even use a Quick peek routine to glance through it when <t was m memory If so you definitely noticed the complete lack of com-ments in the code making it almost impossible for you to decipher and understand it

Well. Instant Software's Labelling Disas-sembler* are the answer to your problem

TLDtS (Tape based Labelling Disassembler| and DLDIS (Disk-based Labelling Disassem-bler) make three passes to assign labels (where appropriate) to the routinea in a machine-language program Their oulput is almost identical to that of a hand-assembled sourca code

You can send the disassembly to a line-printer (Radio Shack parallel port) for either M.DIS or DLDIS (The difference between these utilities is the storage mode of the disassem-bly I

TLDIS can send the disassembly to cassette tape DLDIS can send it to disk both send it to the video monitor The stored disassembly from TlDtS may be reassembled wi th Radio Shack's EDTASM'1 ' the disassembly Irom DLDIS with Apperat's extension of E D T A S M " Because of the use of labels it is a simple matter to change any ob)ect code program by disassembling it and then making changes to the resultant source code without losing track of j u m p load addresses Labels start wi th AAOO' and increment up in even numbered

steps IAAO?. AA04. etc.) The odd numbers IAAOI AA03 etc.) are left for you to use for the source code during reassembly

The printing of the disassembly may be temporari ly halted by using ((SHIFTII Oust as in baaic) or it may be ended by pressing the (BREAKl) key it also has a comments column to display ASCII characters used in a LD or CP opcode

TLDtS and DLDIS may be relocated in mem ory to avoid conflict wi th the program you disassemble The next t ime you need to "c l imb inside" a machine code program take TLDIS or DLDIS with you We promise that it wi l l be an easier journey TLDIS £11 50 cassette DLDIS £15 50 disk

THE A U STARS Here's a collection of our best aelltng games the ones you' l l want to play again and agem It includes SANTA PARAviA AND FIUMACOO — Become tha ruler of a medieval city state as you struggle to create a kingdom Up to six players can compete to *ea who wi l l become the King or Queen OIL TYCOON — Avoid oil spills, blowouts and dry wells as you battle to become the world's nchest oil tycoon. Two players become the owners of compet ing oil companies and there's room for only ONE at tha top1

PARADISE TRADER You're the captain of a trading schooner sailing the Caribbean in search of profits A* you sa.l f rom island to island beware the dangers of the deep pirates ghost ships and hurricane* Good sailing skipper' MILUONAlRE — Hare's S1000 Can you turn rt into a mi l l ion dollars in fifteen (simulated) years? It depends on your strategy as you buy and sell properties, negotiate bank loans, col l e d rentals and accept sealed bids TIMBER BARON An m depth experience of the timber business, f rom dropping trees, until the mi l led lumber reeche* the market Your transactions are affected by thoee unexpected eventual ties that can upset even the most careful plans BATTLEGROUND European Theatre 1944 Your forces are sweeping towards Berlin At your commend are tanks planes, artillery infantry engineers and vehicles Tha battle map wi l l f i l l w i th markers showing the development ot your forces and the location of the enemy in one day of f ighting This two-player game wi l l provide hours of entertain-ment Price £28 50

DOCTOR CHIPS D« CHIPS s a great icebreaker at cocktail parties And if the need aroae. he could enter tarn your early arriving guests while you finished dressing! Your friends wil l be asking you how the guy got into the computer

Why shoulder the burdens of modern life m silence? Put your DR CHIPS to work today and get It all off your chest Price (12 50 casaetia 114 75 disk

Send 75p for ful l catalogue (Refundable against purchase)

Dealer Enquir ies We lcome

ANGLO AMERICAN SOFTWARE CO 138a Stratford Road, Sparkhill, B I R M I N G H A M , B 1 1 1 A G 0 2 1 - 7 7 1 2 9 9 5 24 h o u r a n s a p h o n e

PLEASE SUPPLY

t enclose a cheque PO for £ made payable to A n g l o Amer i can or Debi t m y Access card n u m b e r

S igna tu re

N A M E

ADDRESS

• •

MORE FUN WITH YOUR ZX81!

fQ B Y T E

^ " A C k

The addition of our fully-compatible, assembled, tested and guaranteed

16K RAM PACK PUSH-ON PLUG-COMPATIBLE MEMORY

Means more memory for better games and bigger programs

ORDER YOURS TODAY FROM: CAPS LTD. Dept. B, 28 The Spain, Petersfield, Hants GU32 3LA

Please send me my Byg Byte 16K Ram Pack. I enclose cheque/ postal order for £34.95 (includes VAT, Postage & Packing) Name Address

Dept. B

Allow 28 days for delivery

Fully inclusive price

£34.95 98 COMPUTER 8t VIDEO GAMES

L O N E L Y Gen ie I Microcom-

puter, early eighties, with large

peripheral family but currently

unattached, would like to meet

interesting, attractively pack-

aged software, Gen ie or Tandy

specification, for programming,

problem solving, entertain-

ment and long-lasting

friendship. Reply in confi-

dence. Box N o RS232.

GEHC I

ANSWERING MACHINES " ^ T i c e c e r t i f i e d

LOP intell vateil

ATTll wish mayj mart]

sol me (I ( m i * t ion.l hum

T ^ T y r ^ ^ ^ r n B t .

_ _ i i i i i i i I I I I I

• I t i P ' i i

• ' *

••• Buying your first Genie I microcomputer is just the start of a long and enthralling adventure, for it won't be long before you wil l want to expand your system with some of the wide range of peripherals which make np the complete Genie System.

Firstly there is the

Expansion Box, which immediately expands your Genie's capacity to 32K RAM. and up to 48K RAM if required. It can be connected to 4 disk drives, a printer, RS232 interface or S100 cards.

Then there is the

Printer9 a compact unit with 80 column. 5 x 7 matrix print-out, which connects

to your Qenie through the Expander, or via the Parallel

Printer Interface.

Finally, there is Genie's very own

12 Monitor, a must if you want to let the rest of

the family watch their T V. in peace!

Available i nB&Wor green tube.

The supreme advantage of the Genie I system is its compatibility with the TRS 80. which means that literally 1000's of pre-recorded programs are already available, just waiting to be plugged into your Genie! The recent improvements in the Genie system, including Extended Basic, sound unit and machine language monitor, make it the ideal system for the committed hobbyist, and an excellent and easy-to-use educational tool.

The D i s k Drive gives you greater storage I capacity and full random access • file handling, with the option of double-density through a special adapter. New Dual Disk Drive now available! •

Adventure into -With Maplin

Through a thousand galaxies of time and space... From across the ravaged oceans... From dungeons of fantasies... After battles with enchanted dragons...

Come the fabulous Atari computers... the ultimate creative game computer!

Command a space-ship through the dangers of deep space where alien contact is inevitable or take your chances as you adventure through forbidden lands in search of secret treasures or play Space Invaders. Asteroids, Missile Command. Super Break-out, Shooting Gallery, Jawbreaker etc. etc, just like they are in the arcades, but in the comfort of your own home. Or discover the superb Atari teach-yourselt programs that will help you team: Programming. French. German,

Spanish, Italian and Touch-Typing. Or jusl use the Atari to create your own programs - the Atari makes it so easy to generate really incredible graphics. It's all part of the magic ot Atari. When you decide to buy Atari, you're choosing one ot the most advanced personal computers there is. When you decide to buy Atari from Mapiln, you've made the best choice ot all... because Maplin support Atari... totally!

Write or phone for your Maplin/Atari Information pack NOW!

IfMPILIlim :.. .rfSSST Maplin Electronic Supplies Ltd P.O. Bo* 3, Rayteigh, Essex. Tel: Southend (0702) 552911/554155 • • •

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